Definition of en masse adverb from the Oxford Advanced Learner's Dictionary


en masse

BrE BrE//ˌɒ̃ ˈmæs//
; NAmE NAmE//ˌɑ̃ː ˈmæs//
(from French)
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all together, and usually in large numbers The young folk were emigrating en masse. Word Originlate 18th cent.: French, ‘in a mass’.
See the Oxford Advanced American Dictionary entry: en masse