Plenum vs. Vacuum: What's the Difference?

Plenum and Vacuum Definitions
Plenum
An assembly or meeting with all members present.
Vacuum
Absence of matter.
Plenum
A condition, space, or enclosure in which air or other gas is at a pressure greater than that of the outside atmosphere.
Vacuum
A space empty of matter.
Plenum
The condition of being full; fullness.
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Vacuum
A space relatively empty of matter.
Plenum
A space completely filled with matter.
Vacuum
A space in which the pressure is significantly lower than atmospheric pressure.
Plenum
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.
Vacuum
A state of emptiness; a void.
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Plenum
(physics) A space that is completely filled with matter.
Vacuum
A state of being sealed off from external or environmental influences; isolation.
Plenum
(figuratively) A state of fullness, a great quantity (of something).
Vacuum
Pl. vac·uums A vacuum cleaner.
Plenum
A legislative meeting (especially of the Communist Party) in which all members are present.
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Vacuum
Of, relating to, or used to create a vacuum.
Plenum
An enclosed space having greater than atmospheric pressure.
Vacuum
Containing air or other gas at a reduced pressure.
Plenum
The space above a false ceiling used for cables, ducts etc.
Vacuum
Operating by means of suction or by maintaining a partial vacuum.
Plenum
(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.
Vacuum
To clean with or use a vacuum cleaner.
Plenum
That state in which every part of space is supposed to be full of matter; - opposed to vacuum.
Vacuum
A region of space that contains no matter.
Plenum
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.
Vacuum
A vacuum cleaner.
Plenum
A meeting of a legislative body at which all members are present;
The plenum will vote on all tax increases
Vacuum
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.
A vacuum of 26 inches of mercury, or 13 pounds per square inch
Plenum
An enclosed space in which the air pressure is higher than outside
Vacuum
(physics) A spacetime having tensors of zero magnitude.
Vacuum
An emptiness in life created by a loss of a person who was close, or of an occupation.
Vacuum
(transitive) To clean (something) with a vacuum cleaner.
Vacuum
(intransitive) To use a vacuum cleaner.
Vacuum
To optimise a database or database table by physically removing deleted tuples.
Vacuum
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.
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.
Vacuum
The absence of matter
Vacuum
An empty area or space;
The huge desert voids
The emptiness of outer space
Without their support he'll be ruling in a vacuum
Vacuum
A region empty of matter
Vacuum
An electrical home appliance that cleans by suction
Vacuum
Clean with a vacuum cleaner;
Vacuum the carpets