Definition of Laser 1. An acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light Noun Synonyms for word "laser" Semanticaly linked words with "laser" Hyponims for word "laser" etymology làser [Catalan, Valencian] etymology laser [Danish] etymology Laserdisc etymology lasergun etymology laserless etymology laserlike etymology laserproof etymology laserpuncture etymology laserwort etymology microlaser etymology multilaser etymology nonlaser etymology laser [Finnish] etymology เลเซอร์ [Thai] etymologically related Laserdisc etymologically related Laserpithium etymologically related antilaser etymologically related lase etymologically related laser disc etymologically related laser disk etymologically related laser printer etymologically related laserless etymologically related laserlike etymologically related laserpicium etymologically related maser etymologically related nonlaser etymologically related quantum cascade laser is derived from lasered is derived from lasering is derived from lasers