A compressionstandard derived from LZ77it is reportedly used in zip, gzip, PKZIP, and png, among others.Unlike LZW, deflate compression does not use patented compression algorithms.Used as a verb to mean to compress (not decompress!) a file which has been compressed using deflate compression.The opposite, inflate, means to decompress data which has been deflated.Deflate is described in RFC 1951.(1997-06-21)