Definition of laser noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈleɪzə(r)//
; NAmE NAmE//ˈleɪzər//
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a device that gives out light in which all the waves oscillate (= change direction and strength) together, typically producing a powerful beam of light that can be used for cutting metal, in medical operations, etc. a laser beam a laser navigation device The barcodes on the products are read by lasers. a laser show (= lasers used as entertainment) She's had laser surgery on her eye. See related entries: Manufacturing Word Origin1960s: acronym from light amplification by stimulated emission of radiation, on the pattern of maser.
See the Oxford Advanced American Dictionary entry: laser

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