Plenum vs. Vacuum — What's the Difference?

An assembly or meeting with all members present.

A vacuum is a space devoid of matter. The word is derived from the Latin adjective vacuus for "vacant" or "void".

A condition, space, or enclosure in which air or other gas is at a pressure greater than that of the outside atmosphere.

Absence of matter.

The condition of being full; fullness.

A space empty of matter.

A space completely filled with matter.

A space relatively empty of matter.

A space lying above the ceiling in a building but below the next floor, especially one allowing movement of air between parts of the building.

A space in which the pressure is significantly lower than atmospheric pressure.

(physics) A space that is completely filled with matter.

A state of emptiness; a void.

(figuratively) A state of fullness, a great quantity (of something).

A state of being sealed off from external or environmental influences; isolation.

A legislative meeting (especially of the Communist Party) in which all members are present.

Pl. vac·uums A vacuum cleaner.

An enclosed space having greater than atmospheric pressure.

Of, relating to, or used to create a vacuum.

The space above a false ceiling used for cables, ducts etc.

Containing air or other gas at a reduced pressure.

(computing) A type of network cabling which satisfies plenum-ratings issued by the National Electrical Code. These cables produce less smoke and fumes in the event of fire.

Operating by means of suction or by maintaining a partial vacuum.

That state in which every part of space is supposed to be full of matter; - opposed to vacuum.

To clean with or use a vacuum cleaner.

A condition, as in an occupied room, in which the pressure of the air is greater than that of the outside atmosphere; as, a plenum may exist in a hall ventilated by a fan blower.

A region of space that contains no matter.

A meeting of a legislative body at which all members are present;

A vacuum cleaner.

An enclosed space in which the air pressure is higher than outside

The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.

(physics) A spacetime having tensors of zero magnitude.

An emptiness in life created by a loss of a person who was close, or of an occupation.

(transitive) To clean (something) with a vacuum cleaner.

(intransitive) To use a vacuum cleaner.

To optimise a database or database table by physically removing deleted tuples.

A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum.

The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch.

The absence of matter

An empty area or space;

A region empty of matter

An electrical home appliance that cleans by suction

Clean with a vacuum cleaner;