DECOMPRESS Meaning of DECOMPRESS in English [ ˌdi:kəm'prɛs ]■ verb1》 expand (compressed computer data) to its normal size. 2》 subject (a diver) to ~ion. 3》 N. Amer. informal calm down and relax.Derivatives~or noun Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004