Intrusion Countermeasure Electronics <security, jargon> (ICE) A contrived acronym for security software, coined by {Usenet}ter Tom Maddox and popularised by {William Gibson}'s {cyberpunk} SF novels. In Gibson's novels ICE software responds to intrusion by attempting to literally kill the intruder. The term is not in serious use as of 2000 apart from the commercial software product, {BlackICE} and a growing number of others. See also: {icebreaker}. [{Jargon File}] (2000-03-18)