Definition of en masse in English:

en masse

adverb

  • In a group; all together:

    ‘the cabinet immediately resigned en masse’
    • ‘Baked eggs are a lovely, easy dish to serve to company — especially when the company has arrived en masse.’
    • ‘They came en masse to the city square to demonstrate against the Communist government.’
    as a group, in a body, as one, as a whole, in a mass, wholesale
    simultaneously, all at once, at the same time, at one and the same time, at the same instant, at the same moment, contemporaneously
    in unison, in concert, in chorus
    en bloc, ensemble
    synchronously
    View synonyms

Origin

Late 18th century: French, in a mass.

Pronunciation:

en masse

/ɒ̃ ˈmas/