Definitionen
1.NounA region of space that contains no matter.
2.NounThe 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"
3.NounEllipsis of vacuum cleaner.
4.NounA spacetime having tensors of zero magnitude.
5.NounA ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.
A description of spacetime resulting from a particular compactification of spatial dimensions.
6.NounA description of spacetime resulting from a particular compactification of spatial dimensions.
7.NounAn emptiness in life created by a loss of a person who was close, or of an occupation.
8.NounAn exercise in which one draws their abdomen towards the spine.
9.VerbTo clean (something) with a vacuum cleaner.
10.VerbTo use a vacuum cleaner.
11.VerbTo optimise a database or database table by physically removing deleted tuples.