en masse
adverb/ˌɒ̃ ˈmæs/
/ˌɑ̃ː ˈmæs/
(from French)- all together, and usually in large numbers
- The young folk were emigrating en masse.
Word Originlate 18th cent.: French, ‘in a mass’.
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en masse
Definition of en masse adverb from the Oxford Advanced Learner's Dictionary