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Constant Definition and Meaning

By Fiza Rafique & Urooj Arif — Published on June 21, 2024
Constant means something that does not change or vary, remaining steady and unchanged over time. e.g., She appreciated his constant support during difficult times.

Constant Definitions

Unchanging in nature, value, or extent; persistent.
His interest in the project was constant.
Not faltering or wavering; firm.
She maintained a constant pace during the marathon.
Regularly attentive or solicitous; devoted.
The nurse's constant care was vital to the patient's recovery.
Not changing or varying; continuous
A constant gentle rain.
Drove at a constant speed.
Happening regularly or repeatedly; continual
The constant barking of the dog next door.
Constant interruptions.
Unchanging in nature, value, or extent; invariable
A constant wind speed.
Steadfast in purpose, loyalty, or affection; faithful
A constant friend.
Something that is unchanging or invariable.
A quantity assumed to have a fixed value in a specified mathematical context.
An experimental or theoretical condition, factor, or quantity that does not vary or that is regarded as invariant in specified circumstances.
Unchanged through time or space; permanent.
Consistently recurring over time; persistent.
Steady in purpose, action, feeling, etc.
Firm; solid; not fluid.
(obsolete) Consistent; logical.
Bounded above by a constant.
Constant time
Constant space
That which is permanent or invariable.
(algebra) A quantity that remains at a fixed value throughout a given discussion.
(science) Any property of an experiment, determined numerically, that does not change under given circumstances.
(computing) An identifier that is bound to an invariant value; a fixed value given a name to aid in readability of source code.
Firm; solid; fixed; immovable; - opposed to fluid.
If . . . you mix them, you may turn these two fluid liquors into a constant body.
Not liable, or given, to change; permanent; regular; continuous; continually recurring; steadfast; faithful; not fickle. Opposite of changeable and variable.
Both loving one fair maid, they yet remained constant friends.
I am constant to my purposes.
His gifts, his constant courtship, nothing gained.
Onward the constant current sweeps.
Remaining unchanged or invariable, as a quantity, force, law, etc.
Consistent; logical.
That which is not subject to change; that which is invariable.
A quantity that does not change its value; - used in countradistinction to variable.
A number whose value, when ascertained (as by observation) and substituted in a general mathematical formula expressing an astronomical law, completely determines that law and enables predictions to be made of its effect in particular cases.
A number expressing some property or condition of a substance or of an instrument of precision; as, the dielectric constant of quartz; the collimation constant of a transit instrument.
A data structure that does not change during the course of execution of a program. It may be a number, a string, or a more complex data structure; - contrasted with variable.
A quantity that does not vary
A number representing a quantity assumed to have a fixed value in a specified mathematical context;
The velocity of light is a constant
Persistent in occurrence and unvarying in nature;
Maintained a constant temperature
A constant beat
Principles of unvarying validity
A steady breeze
Continually recurring or continuing without interruption;
Constant repetition of the exercise
Constant chatter of monkeys
Steadfast in purpose or devotion or affection;
A man constant in adherence to his ideals
A constant lover
Constant as the northern star
Uninterrupted in time and indefinitely long continuing;
The ceaseless thunder of surf
In constant pain
Night and day we live with the incessant noise of the city
The never-ending search for happiness
The perpetual struggle to maintain standards in a democracy
Man's unceasing warfare with drought and isolation
Unremitting demands of hunger
Continuously occurring or repetitive.
The constant hum of the air conditioner was soothing.
Faithful and unswerving in love, support, or allegiance.
Her constant friendship was a source of comfort.
Continually recurring or continuing without interruption.
He faced constant interruptions while trying to work.
Staying resolute despite opposition or difficulties.
His constant determination helped him overcome many challenges.
A fixed or habitual pattern of behavior or occurrence.
It was his constant habit to read before bed.
A quantity that remains at a fixed value throughout a given discussion.
In that equation, the speed of light is considered a constant.
Always present or encountered.
The risk of failure is a constant in this business.

Constant Snonyms


Not changing; remaining the same.
The landscape seemed unchanging as they drove through the plains.


Not wavering; steady or resolute.
Her unwavering support during his illness was crucial.


Firmly fixed, supported, or balanced; not shaking or moving.
He kept a steady hand on the tiller.


Continuing firmly or obstinately in an action in spite of difficulty.
Her persistent efforts eventually paid off.


Continuing without pause or interruption.
The incessant noise made it hard to concentrate.


Not stopped, blocked, or obstructed.
She enjoyed a few hours of uninterrupted sleep.


Never ending or changing; occurring repeatedly.
They lived under the perpetual threat of war.


Forming a sequence in which the same action or event is repeated frequently.
The continual delays frustrated everyone.


Lasting over a period of time; durable.
Their enduring friendship has lasted through many hardships.


Arranged in or constituting a constant or definite pattern.
He made regular visits to the clinic.

Constant Idioms & Phrases

Keep constant watch

To continually monitor or guard something.
They kept constant watch over the entrance.

A constant thorn in one’s side

A continual source of annoyance.
The unresolved issue was a constant thorn in his side.

Constant as the northern star

Unchanging and reliable.
His principles are as constant as the northern star.

Constant companion

A person or thing that is always present.
Her dog has been her constant companion for years.

Constant state of flux

Always changing or evolving.
The industry is in a constant state of flux.

Constant reminder

Something that frequently reminds one of something.
The photograph was a constant reminder of her homeland.

At a constant rate

Occurring at an unvarying speed or rhythm.
The machine operates at a constant rate.

In constant motion

Always moving; never still.
The toddler was in constant motion from dawn till dusk.

Be a constant

To be a stable or unchanging factor in a situation.
She was a constant in his life through all the upheaval.

Constant battle

An ongoing struggle.
Keeping the garden weed-free is a constant battle.

Constant Example Sentences

The constant rain made the hiking trail muddy and slippery.
The sound of the waves provided a constant backdrop to our beach holiday.
She was a constant in his chaotic life.
Her constant cheerfulness brightened the office.
We need to maintain constant vigilance to prevent errors.
The constant barking of the neighbor's dog was becoming a nuisance.
The market is in a constant state of change.
The constant hum of the city never seemed to cease.
His loyalty was a constant through the years.
They enjoyed the constant flow of visitors during the festival.
The machinery requires constant maintenance.
He faced constant challenges during the project.
The temperature in the lab must remain constant.
She provided constant care to her ailing mother.
The constant evolution of technology is hard to keep up with.

Common Curiosities

How many syllables are in "constant"?

"Constant" has two syllables.

How do we divide "constant" into syllables?

"Constant" is divided into syllables as con-stant.

What is a stressed syllable in "constant"?

The stressed syllable in "constant" is the first syllable, con-.

Why is it called "constant"?

The term "constant" comes from the Latin "constans," which means standing firm or stable, derived from the verb "stare," meaning to stand.

What part of speech is "constant"?

"Constant" is an adjective.

What is the singular form of "constant"?

"Constant" does not have a singular or plural form as it is an adjective.

How is "constant" used in a sentence?

"Constant" is used to describe something that is unchanging or continuous, e.g., He appreciated her constant support.

What is the verb form of "constant"?

"Constant" is primarily an adjective. It does not have a verb form.

What is the pronunciation of "constant"?

"Constant" is pronounced as /ˈkɒn.stənt/.

What is another term for "constant"?

Another term for "constant" is "steady."

What is the plural form of "constant"?

As an adjective, "constant" does not have a plural form.

What is the opposite of "constant"?

The opposite of "constant" could be "variable" or "changing."

Is "constant" a collective noun?

No, "constant" is not a collective noun.

What is the root word of "constant"?

The root of "constant" is the Latin word "constans."

Is "constant" a noun or adjective?

"Constant" is primarily an adjective but can also be used as a noun.

Is "constant" a countable noun?

When used as a noun, "constant" is countable in contexts like mathematical constants.

Is "constant" an adverb?

No, "constant" is not an adverb.

Which preposition is used with "constant"?

"Constant" is often used with "in" or "of," as in "constant in purpose" or "constant of purpose."

Which article is used with "constant"?

The definite article "the" is often used with "constant," especially when referring to specific instances, e.g., "the constant temperature."

Is "constant" an abstract noun?

As a noun, "constant" refers to a fixed value and is not abstract.

Is the "constant" term a metaphor?

"Constant" can be used metaphorically to describe someone or something that is reliably unchanging.

Is the word "constant" imperative?

As an adjective, "constant" cannot be imperative.

Is the word “constant” a Direct object or an Indirect object?

As an adjective or noun, "constant" does not serve as a direct or indirect object itself but may describe one.

Which determiner is used with "constant"?

Determiners like "a" or "the" can be used with "constant," as in "a constant problem" or "the constant noise."

Which vowel is used before "constant"?

Typically, "a" is used before "constant" as in "a constant issue."

Which conjunction is used with "constant"?

Conjunctions like "and" or "but" can be used with "constant," e.g., "constant and reliable."

Is "constant" a negative or positive word?

"Constant" is generally neutral but can be positive or negative depending on the context.

Is "constant" a vowel or consonant?

"Constant" begins with the consonant 'c'.

Is the word "constant" Gerund?

"Constant" does not have a gerund form as it is not a verb.

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Co-written by
Urooj Arif
Urooj is a skilled content writer at Ask Difference, known for her exceptional ability to simplify complex topics into engaging and informative content. With a passion for research and a flair for clear, concise writing, she consistently delivers articles that resonate with our diverse audience.

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