vacuum

Tanımlar (İngilizce)

1. isim A region of space that contains no matter.
2. isim 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”

3. isim Ellipsis of vacuum cleaner.
4. isim A spacetime having tensors of zero magnitude.
5. isim A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.
6. isim A description of spacetime resulting from a particular compactification of spatial dimensions.
7. isim 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.”

8. isim An exercise in which one draws their abdomen towards the spine.

   “Abs show up in a most-muscular shot, a vacuum shot, the hands-behind-head compulsory ab shot, twisting poses, and so on.”

9. fiil To clean (something) with a vacuum cleaner.

   ““Who in the world cleans an attic? That's like vacuuming a shed.””

10. fiil To use a vacuum cleaner.
11. fiil To optimise a database or database table by physically removing deleted tuples.

    “But the advantage of an auto-vacuumed database is that when B-tree pages are no longer needed, they are moved to the end of the database file and then the database file is truncated, thus returning the unused pages back to the filesystem.”