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



BrE BrE//ˈækrənɪm//
; NAmE NAmE//ˈækrənɪm//
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a word formed from the first letters of the words that make up the name of something, for example ‘AIDS’ is an acronym for ‘acquired immune deficiency syndrome’ Word Origin1940s: from Greek akron ‘end, tip’ + -onym.
See the Oxford Advanced American Dictionary entry: acronym