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Heat vs. Fire — What's the Difference?

Heat vs. Fire — What's the Difference?

Difference Between Heat and Fire

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Heat

In thermodynamics, heat is energy in transfer to or from a thermodynamic system, by mechanisms other than thermodynamic work or transfer of matter. The various mechanisms of energy transfer that define heat are stated in the next section of this article.
Jun 14, 2022

Fire

Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Fire is hot because the conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O2); the bond energies of the fuel play only a minor role here.
Jun 14, 2022

Heat

A form of energy associated with the kinetic energy of atoms or molecules and capable of being transmitted through solid and fluid media by conduction, through fluid media by convection, and through empty space by radiation.
Jun 14, 2022

Fire

A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance
Destruction by fire.
Jun 14, 2022

Heat

The transfer of energy from one body to another as a result of a difference in temperature or a change in phase.
Jun 14, 2022
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Fire

A specific instance of this change that destroys something
A house fire.
Jun 14, 2022

Heat

The sensation or perception of such energy as warmth or hotness.
Jun 14, 2022

Fire

A burning fuel
A cooking fire.
Jun 14, 2022

Heat

An abnormally high bodily temperature, as from a fever.
Jun 14, 2022

Fire

Burning intensity of feeling; ardor or enthusiasm
A musical performance that had fire.
Jun 14, 2022

Heat

The condition of being hot.
Jun 14, 2022

Fire

Luminosity or brilliance, as of a cut and polished gemstone.
Jun 14, 2022

Heat

A degree of warmth or hotness
The burner was on low heat.
Jun 14, 2022

Fire

Liveliness and vivacity of imagination; brilliance
The fire of an artistic genius.
Jun 14, 2022

Heat

The warming of a room or building by a furnace or another source of energy
The house was cheap to rent, but the heat was expensive.
Jun 14, 2022

Fire

A severe test; a trial or torment
Went through fire to become a leader.
Jun 14, 2022

Heat

A furnace or other source of warmth in a room or building
The heat was on when we returned from work.
Jun 14, 2022

Fire

A fever or bodily inflammation
Tormented by the fire in an infected toe.
Jun 14, 2022

Heat

A hot season; a spell of hot weather.
Jun 14, 2022

Fire

The discharge of firearms or artillery
Heard the fire of cannon.
Jun 14, 2022

Heat

Intensity, as of passion, emotion, color, appearance, or effect.
Jun 14, 2022

Fire

The launching of a missile, rocket, or similar ballistic body.
Jun 14, 2022

Heat

The most intense or active stage
The heat of battle.
Jun 14, 2022

Fire

Discharged bullets or other projectiles
Subjected enemy positions to heavy mortar fire.
Struck by rifle fire.
Jun 14, 2022

Heat

A burning sensation in the mouth produced by spicy flavoring in food.
Jun 14, 2022

Fire

Intense, repeated attack or criticism
Answered the fire from her political critics.
Jun 14, 2022

Heat

Estrus.
Jun 14, 2022

Fire

To cause to burn; ignite or set fire to
Fired the enemy's encampment.
Jun 14, 2022

Heat

One of a series of efforts or attempts.
Jun 14, 2022

Fire

To illuminate or cause to resemble fire, as in color
The morning sun fired the tops of the trees.
Jun 14, 2022

Heat

Sports & Games One round of several in a competition, such as a race.
Jun 14, 2022

Fire

To start (a fuel-burning engine or a vehicle with such an engine). Often used with up.
Jun 14, 2022

Heat

A preliminary contest held to determine finalists.
Jun 14, 2022

Fire

To start or tend a fire in
Fire a furnace.
Jun 14, 2022

Heat

(Informal) Pressure; stress.
Jun 14, 2022

Fire

To arouse the emotions of; make enthusiastic or ardent. Often used with up
Demonstrators who were fired up by their sense of injustice.
Jun 14, 2022

Heat

An intensification of police activity in pursuing criminals.
Jun 14, 2022

Fire

To inspire or arouse (an emotion or the imagination).
Jun 14, 2022

Heat

The police. Used with the.
Jun 14, 2022

Fire

To bake or dry by heating, as in a kiln
Fire pottery.
Jun 14, 2022

Heat

(Slang) Adverse comments or hostile criticism
Heat from the press forced the senator to resign.
Jun 14, 2022

Fire

To discharge (a firearm, for example).
Jun 14, 2022

Heat

(Slang) A firearm, especially a pistol.
Jun 14, 2022

Fire

To detonate (an explosive).
Jun 14, 2022

Heat

To make warm or hot.
Jun 14, 2022

Fire

To propel (a projectile) from a weapon or launch (a missile)
Fired several rounds before the gun jammed.
Jun 14, 2022

Heat

To excite the feelings of; inflame.
Jun 14, 2022

Fire

(Informal) To throw or propel with force and speed
Fire a ball at a batter.
Fire a puck at the goal.
Jun 14, 2022

Heat

(Physics) To increase the heat energy of (an object).
Jun 14, 2022

Fire

To utter or direct with insistence
Fired questions at the senator.
Jun 14, 2022

Heat

To become warm or hot.
Jun 14, 2022

Fire

(Games) To score (a number) in a game or contest
The golfer fired a 35 on the front nine.
Jun 14, 2022

Heat

To become excited emotionally or intellectually.
Jun 14, 2022

Fire

To end the employment or service of; dismiss.
Jun 14, 2022

Heat

(uncountable) Thermal energy.
This furnace puts out 5000 BTUs of heat.
That engine is really throwing off some heat.
Removal of heat from the liquid caused it to turn into a solid.
Jun 14, 2022

Fire

To become ignited; flame up
Wet kindling that just wouldn't fire.
Jun 14, 2022

Heat

(uncountable) The condition or quality of being hot.
Stay out of the heat of the sun!
Jun 14, 2022

Fire

To shoot a weapon
Aimed and fired at the target.
Jun 14, 2022

Heat

(uncountable) An attribute of a spice that causes a burning sensation in the mouth.
The chili sauce gave the dish heat.
Jun 14, 2022

Fire

To detonate an explosive.
Jun 14, 2022

Heat

(uncountable) A period of intensity, particularly of emotion.
It's easy to make bad decisions in the heat of the moment.
Jun 14, 2022

Fire

To ignite fuel; start
The engine fired right away.
Jun 14, 2022

Heat

(uncountable) An undesirable amount of attention.
The heat from her family after her DUI arrest was unbearable.
Jun 14, 2022

Fire

To send out a projectile; discharge
The cannons fired for hours.
Jun 14, 2022

Heat

The police.
The heat! Scram!
Jun 14, 2022

Fire

To propel or hurl a projectile
The pitcher wound up and fired.
Jun 14, 2022

Heat

One or more firearms.
Jun 14, 2022

Fire

(Physiology) To generate an electrical impulse. Used of a neuron.
Jun 14, 2022

Heat

A fastball.
The catcher called for the heat, high and tight.
Jun 14, 2022

Fire

To become yellowed or brown before reaching maturity, as grain.
Jun 14, 2022

Heat

(uncountable) A condition where a mammal is aroused sexually or where it is especially fertile and therefore eager to mate; oestrus.
The male canines were attracted by the female in heat.
Jun 14, 2022

Fire

(uncountable) A (usually self-sustaining) chemical reaction involving the bonding of oxygen with carbon or other fuel, with the production of heat and the presence of flame or smouldering.
Jun 14, 2022

Heat

In omegaverse fiction, a cyclical period in which omegas experience an intense, sometimes irresistible biological urge to mate.
Jun 14, 2022

Fire

(countable) An instance of this chemical reaction, especially when intentionally created and maintained in a specific location to a useful end (such as a campfire or a hearth fire).
We sat about the fire singing songs and telling tales.
Jun 14, 2022

Heat

(countable) A preliminary race, used to determine the participants in a final race
The runner had high hopes, but was out of contention after the first heat.
Jun 14, 2022

Fire

(countable) The occurrence, often accidental, of fire in a certain place, causing damage and danger.
There was a fire at the school last night and the whole place burned down.
During hot and dry summers many fires in forests are caused by regardlessly discarded cigarette butts.
Jun 14, 2022

Heat

A stage in a competition, not necessarily a sporting one; a round.
Jun 14, 2022

Fire

The aforementioned chemical reaction of burning, considered one of the Classical elements or basic elements of alchemy.
Jun 14, 2022

Heat

(countable) One cycle of bringing metal to maximum temperature and working it until it is too cool to work further.
I can make a scroll like that in a single heat.
Jun 14, 2022

Fire

A heater or stove used in place of a real fire (such as an electric fire).
Jun 14, 2022

Heat

(countable) A hot spell.
The children stayed indoors during this year's summer heat.
Jun 14, 2022

Fire

(countable) The elements necessary to start a fire.
The fire was laid and needed to be lit.
Jun 14, 2022

Heat

(uncountable) Heating system; a system that raises the temperature of a room or building.
I'm freezing; could you turn on the heat?
Jun 14, 2022

Fire

(uncountable) The bullets or other projectiles fired from a gun or other ranged weapon.
The fire from the enemy guns kept us from attacking.
Jun 14, 2022

Heat

(uncountable) The output of a heating system.
During the power outage we had no heat because the controls are electric.
Older folks like more heat than the young.
Jun 14, 2022

Fire

(countable) A planned bombardment by artillery or similar weapons, or the capability to deliver such.
We dominated the battlespace with our fires.
Jun 14, 2022

Heat

(countable) A violent action unintermitted; a single effort.
Jun 14, 2022

Fire

A barrage, volley
Jun 14, 2022

Heat

To get a negative reaction from the audience, especially as a heel (or bad character).
Jun 14, 2022

Fire

(rocketry) An instance of firing one or more rocket engines.
Static fire
Jun 14, 2022

Heat

(transitive) To cause an increase in temperature of (an object or space); to cause to become hot often with "up".
I'll heat up the water.
Jun 14, 2022

Fire

Strength of passion, whether love or hate.
Jun 14, 2022

Heat

(intransitive) To become hotter.
There's a pot of soup heating on the stove.
Jun 14, 2022

Fire

Liveliness of imagination or fancy; intellectual and moral enthusiasm.
Jun 14, 2022

Heat

To excite or make hot by action or emotion; to make feverish.
Jun 14, 2022

Fire

Splendour; brilliancy; lustre; hence, a star.
Jun 14, 2022

Heat

To excite ardour in; to rouse to action; to excite to excess; to inflame, as the passions.
Jun 14, 2022

Fire

A severe trial; anything inflaming or provoking.
Jun 14, 2022

Heat

To arouse, to excite (sexually).
The massage heated her up.
Jun 14, 2022

Fire

Red coloration in a piece of opal.
Jun 14, 2022

Heat

A force in nature which is recognized in various effects, but especially in the phenomena of fusion and evaporation, and which, as manifested in fire, the sun's rays, mechanical action, chemical combination, etc., becomes directly known to us through the sense of feeling. In its nature heat is a mode of motion, being in general a form of molecular disturbance or vibration. It was formerly supposed to be a subtile, imponderable fluid, to which was given the name caloric.
Jun 14, 2022

Fire

(slang) Amazing; excellent.
That shit is fire, yo!
Jun 14, 2022

Heat

The sensation caused by the force or influence of heat when excessive, or above that which is normal to the human body; the bodily feeling experienced on exposure to fire, the sun's rays, etc.; the reverse of cold.
Jun 14, 2022

Fire

(transitive) To set (something, often a building) on fire.
Jun 14, 2022

Heat

High temperature, as distinguished from low temperature, or cold; as, the heat of summer and the cold of winter; heat of the skin or body in fever, etc.
Else how had the world . . . Avoided pinching cold and scorching heat!
Jun 14, 2022

Fire

(transitive) To heat as with fire, but without setting on fire, as ceramic, metal objects, etc.
If you fire the pottery at too high a temperature, it may crack.
They fire the wood to make it easier to put a point on the end.
Jun 14, 2022

Heat

Indication of high temperature; appearance, condition, or color of a body, as indicating its temperature; redness; high color; flush; degree of temperature to which something is heated, as indicated by appearance, condition, or otherwise.
It has raised . . . heats in their faces.
The heats smiths take of their iron are a blood-red heat, a white-flame heat, and a sparkling or welding heat.
Jun 14, 2022

Fire

(transitive) To drive away by setting a fire.
Jun 14, 2022

Heat

A single complete operation of heating, as at a forge or in a furnace; as, to make a horseshoe in a certain number of heats.
Jun 14, 2022

Fire

(transitive) To terminate the employment contract of (an employee), especially for cause (such as misconduct or poor performance).
Jun 14, 2022

Heat

A violent action unintermitted; a single effort; a single course in a race that consists of two or more courses; as, he won two heats out of three.
Many causes . . . for refreshment betwixt the heats.
[He] struck off at one heat the matchless tale of "Tam o' Shanter."
Jun 14, 2022

Fire

To terminate a contract with a client; to drop a client.
Jun 14, 2022

Heat

Utmost violence; rage; vehemence; as, the heat of battle or party.
Jun 14, 2022

Fire

(transitive) To shoot (a gun, rocket/missile, or analogous device).
We will fire our guns at the enemy.
The jet fired a salvo of rockets at the truck convoy.
He fired his radar gun at passing cars.
Jun 14, 2022

Heat

Agitation of mind; inflammation or excitement; exasperation.
Jun 14, 2022

Fire

(intransitive) To shoot a gun, cannon, or similar weapon.
Don't fire until you see the whites of their eyes.
Jun 14, 2022

Heat

Animation, as in discourse; ardor; fervency; as, in the heat of argument.
With all the strength and heat of eloquence.
Jun 14, 2022

Fire

(rocketry) To operate a rocket engine to produce thrust.
The RCS thrusters fired several times to stabilize the tumbling spacecraft.
Jun 14, 2022

Heat

Sexual excitement in animals; readiness for sexual activity; estrus or rut.
Jun 14, 2022

Fire

To set off an explosive in a mine.
Jun 14, 2022

Heat

Fermentation.
Jun 14, 2022

Fire

To shoot; to attempt to score a goal.
Jun 14, 2022

Heat

Strong psychological pressure, as in a police investigation; as, when they turned up the heat, he took it on the lam.
Jun 14, 2022

Fire

To cause an action potential in a cell.
When a neuron fires, it transmits information.
Jun 14, 2022

Heat

To make hot; to communicate heat to, or cause to grow warm; as, to heat an oven or furnace, an iron, or the like.
Heat me these irons hot.
Jun 14, 2022

Fire

(transitive) To forcibly direct (something).
He answered the questions the reporters fired at him.
Jun 14, 2022

Heat

To excite or make hot by action or emotion; to make feverish.
Pray, walk softly; do not heat your blood.
Jun 14, 2022

Fire

To initiate an event (by means of an event handler).
The event handler should only fire after all web page content has finished loading.
The queue fires a job whenever the thread pool is ready to handle it.
Jun 14, 2022

Heat

To excite ardor in; to rouse to action; to excite to excess; to inflame, as the passions.
A noble emulation heats your breast.
Jun 14, 2022

Fire

(transitive) To inflame; to irritate, as the passions.
To fire the soul with anger, pride, or revenge
Jun 14, 2022

Heat

To grow warm or hot by the action of fire or friction, etc., or the communication of heat; as, the iron or the water heats slowly.
Jun 14, 2022

Fire

To be irritated or inflamed with passion.
Jun 14, 2022

Heat

To grow warm or hot by fermentation, or the development of heat by chemical action; as, green hay heats in a mow, and manure in the dunghill.
Jun 14, 2022

Fire

To animate; to give life or spirit to.
To fire the genius of a young man
Jun 14, 2022

Heat

Heated; as, the iron though heat red-hot.
Jun 14, 2022

Fire

To feed or serve the fire of.
To fire a boiler
Jun 14, 2022

Heat

A form of energy that is transferred by a difference in temperature
Jun 14, 2022

Fire

(transitive) To light up as if by fire; to illuminate.
Jun 14, 2022

Heat

The presence of heat
Jun 14, 2022

Fire

To cauterize.
Jun 14, 2022

Heat

The sensation caused by heat energy
Jun 14, 2022

Fire

To catch fire; to be kindled.
Jun 14, 2022

Heat

Intense passion or emotion
Jun 14, 2022

Fire

Command to shoot with firearms
Jun 14, 2022

Heat

Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
Jun 14, 2022

Fire

The evolution of light and heat in the combustion of bodies; combustion; state of ignition.
Jun 14, 2022

Heat

A preliminary race in which the winner advances to a more important race
Jun 14, 2022

Fire

Fuel in a state of combustion, as on a hearth, or in a stove or a furnace.
Jun 14, 2022

Heat

Utility to warm a building;
The heating system wasn't working
They have radiant heating
Jun 14, 2022

Fire

The burning of a house or town; a conflagration.
Jun 14, 2022

Heat

Make hot or hotter;
Heat the soup
Jun 14, 2022

Fire

Anything which destroys or affects like fire.
Jun 14, 2022

Heat

Provide with heat;
Heat the house
Jun 14, 2022

Fire

Ardor of passion, whether love or hate; excessive warmth; consuming violence of temper.
He had fire in his temper.
Jun 14, 2022

Heat

Arouse or excite feelings and passions;
The ostentatious way of living of the rich ignites the hatred of the poor
The refugees' fate stirred up compassion around the world
Wake old feelings of hatred
Jun 14, 2022

Fire

Liveliness of imagination or fancy; intellectual and moral enthusiasm; capacity for ardor and zeal.
And bless their critic with a poet's fire.
Jun 14, 2022

Heat

Gain heat or get hot;
The room heated up quickly
Jun 14, 2022

Fire

Splendor; brilliancy; luster; hence, a star.
Stars, hide your fires.
As in a zodiacrepresenting the heavenly fires.
Jun 14, 2022

Fire

Torture by burning; severe trial or affliction.
Jun 14, 2022

Fire

The discharge of firearms; firing; as, the troops were exposed to a heavy fire.
Jun 14, 2022

Fire

To set on fire; to kindle; as, to fire a house or chimney; to fire a pile.
Jun 14, 2022

Fire

To subject to intense heat; to bake; to burn in a kiln; as, to fire pottery.
Jun 14, 2022

Fire

To inflame; to irritate, as the passions; as, to fire the soul with anger, pride, or revenge.
Love had fired my mind.
Jun 14, 2022

Fire

To animate; to give life or spirit to; as, to fire the genius of a young man.
Jun 14, 2022

Fire

To feed or serve the fire of; as, to fire a boiler.
Jun 14, 2022

Fire

To light up as if by fire; to illuminate.
[The sun] fires the proud tops of the eastern pines.
Jun 14, 2022

Fire

To cause to explode; as, to fire a torpedo; to disharge; as, to fire a rifle, pistol, or cannon; to fire cannon balls, rockets, etc.
Jun 14, 2022

Fire

To drive by fire.
Till my bad angel fire my good one out.
Jun 14, 2022

Fire

To cauterize.
Jun 14, 2022

Fire

To dismiss from employment, a post, or other job; to cause (a person) to cease being an employee; - of a person. The act of firing is usually performed by that person's supervisor or employer.
Jun 14, 2022

Fire

To take fire; to be kindled; to kindle.
Jun 14, 2022

Fire

To be irritated or inflamed with passion.
Jun 14, 2022

Fire

To discharge artillery or firearms; as, they fired on the town.to grow irritated or angry.
Jun 14, 2022

Fire

The event of something burning (often destructive);
They lost everything in the fire
Jun 14, 2022

Fire

The process of combustion of inflammable materials producing heat and light and (often) smoke;
Fire was one of our ancestors' first discoveries
Jun 14, 2022

Fire

The act of firing weapons or artillery at an enemy;
Hold your fire until you can see the whites of their eyes
They retreated in the face of withering enemy fire
Jun 14, 2022

Fire

A fireplace in which a fire is burning;
They sat by the fire and talked
Jun 14, 2022

Fire

Intense adverse criticism;
Clinton directed his fire at the Republican Party
The government has come under attack
Don't give me any flak
Jun 14, 2022

Fire

Feelings of great warmth and intensity;
He spoke with great ardor
Jun 14, 2022

Fire

Once thought to be one of four elements composing the universe (Empedocles)
Jun 14, 2022

Fire

A severe trial;
He went through fire and damnation
Jun 14, 2022

Fire

Start firing a weapon
Jun 14, 2022

Fire

Cause to go off;
Fire a gun
Fire a bullet
Jun 14, 2022

Fire

Bake in a kiln so as to harden;
Fire pottery
Jun 14, 2022

Fire

Terminate the employment of;
The boss fired his secretary today
The company terminated 25% of its workers
Jun 14, 2022

Fire

Go off or discharge;
The gun fired
Jun 14, 2022

Fire

Drive out or away by or as if by fire;
The soldiers were fired
Surrender fires the cold skepticism
Jun 14, 2022

Fire

Call forth (emotions, feelings, and responses);
Arouse pity
Raise a smile
Evoke sympathy
Jun 14, 2022

Fire

Destroy by fire;
They burned the house and his diaries
Jun 14, 2022

Fire

Provide with fuel;
Oil fires the furnace
Jun 14, 2022

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