COMPRESSION
compression, compressing
(noun) applying pressure
compression
(noun) encoding information while reducing the bandwidth or bits required
compression, condensation, contraction
(noun) the process or result of becoming smaller or pressed together; “the contraction of a gas on cooling”
compaction, compression, concretion, densification
(noun) an increase in the density of something
Source: WordNet® 3.1
Etymology
Noun
compression (countable and uncountable, plural compressions)
An increase in density; the act of compressing, or the state of being compressed; compaction.
(automotive) The cycle of an internal combustion engine during which the fuel and air mixture is compressed.
(computing) The process by which data is compressed.
(music) The electronic process by which any sound's gain is automatically controlled.
(astronomy) The deviation of a heavenly body from a spherical form.
Antonyms
• decompression
• rarefaction
Source: Wiktionary
Com*pres"sion, n. Etym: [L. compressio: cf. F. compression.]
Definition: The act of compressing, or state of being compressed.
"Compression of thought." Johnson.
Source: Webster’s Unabridged Dictionary 1913 Edition