English Dictionary

vacuum

/ˈvæ.kjuːm/

noun

A region of space that contains no matter. / (colloquial, only pluralized as "vacuums") A vacuum cleaner.

The vacuum of space is vast and empty.

意味（1）

A region of space that contains no matter.

The Wards are open-topped, with skyscrapers rising from the superstructure. Towers are sealed against vacuum, as the breathable atmosphere envelope is only maintained to a height of about seven meters. The atmosphere is contained by the centrifugal force of rotation and a membrane of dense, colorless sulphur hexafluoride gas, held in place by carefully managed mass effect fields.

意味（2）

(colloquial, only pluralized as "vacuums") A vacuum cleaner.

意味（3）

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

意味（4）

(physics) A spacetime having tensors of zero magnitude.

意味（5）

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

Henrietta soon found a terrible vacuum left, by the letters in which she used to pour forth every feeling and thought to her uncle.