meaning of vacuum

1. 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.
2.
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.
3.
an electrical home appliance that cleans by suction


Related Words

vacuum | vacuum aspiration | vacuum bag | vacuum bomb | vacuum bottle | vacuum chamber | vacuum cleaner | vacuum flask | vacuum gage | vacuum gauge | vacuum pump | vacuum tube | vacuum-clean | vacuums |

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