›to press something into a smaller space: Firmly compress the soil in the pot so that the plant is secure.compressed airSqueezing and grinding›to make information, a piece of writing, etc. shorter: The course compresses two year's training into six intensive months.I managed to compress ten pages of notes into four paragraphs.Becoming and making smaller or lessBecoming and making less strong›to make a computer file use less space when it is stored in the memory of a computer or on a disk, by using a special program: to compress data/filesOperating computerscompression
/-ˈpreʃ.ən/noun[U]›the action of compressing or being compressedSqueezing and grindingcompressible
/-ɪ.bl̩/adjective›compressible gasThe state of matter