Compression /kəmˈprɛʃən/ (lat. Compression – compress) – reducing the occupied volume of gaseous bodies, as well as their pressure and impact. Compressors, internal combustion engines. In scientific and technical literature published in the USSR, instead of the term “K,” the term “compression” is usually used, but it has a more general meaning (when a gas is cooled, its volume decreases) and is used for solids. bodies.