compression
n 1: an increase in the density of something [syn: {compaction},
{concretion}, {densification}]
2: the process or result of becoming smaller or pressed
together: "the contraction of a gas on cooling" [syn: {condensation},
{contraction}]
3: encoding information while reducing the bandwidth or bits
required [ant: {decompression}]
4: applying pressure [syn: {compressing}] [ant: {decompression}]