compress

v. press together, make smaller using pressure; condense

n. poultice, bandage

compress is a UNIX compression program based on the LZC compression method, which is an LZW implementation using variable size pointers as in LZ78.
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Noun
1. a cloth pad or dressing (with or without medication) applied firmly to some part of the body (to relieve discomfort or reduce fever)
(hypernym) dressing, medical dressing
(substance-meronym) foamentation
Verb
1. make more compact by or as if by pressing; "compress the data"
(synonym) compact, pack together
(antonym) decompress, uncompress
(hypernym) wedge, squeeze, force
(hyponym) tamp down, tamp, pack
(entail) press
(derivation) compression
2. squeeze or press together; "she compressed her lips"; "the spasm contracted the muscle"
(synonym) constrict, squeeze, compact, contract, press
(hypernym) tighten
(hyponym) choke, strangle
(derivation) compression, condensation, contraction

(v. t.)
To press or squeeze together; to force into a narrower compass; to reduce the volume of by pressure; to compact; to condense; as, to compress air or water.
  

(v. t.)
To embrace sexually.
  

(n.)
A folded piece of cloth, pledget of lint, etc., used to cover the dressing of wounds, and so placed as, by the aid of a bandage, to make due pressure on any part.
  

See data compaction, data compression, signal compression.