Definition of en masse in English:

en masse

adverb

  • In a group; all together.

    ‘the board of directors 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.’
    together, all together, as a group, in a body, as one, as a whole, in a mass, wholesale
    View synonyms

Origin

Late 18th century: French, ‘in a mass’.

Pronunciation

en masse

/än ˈmas//ɑn ˈmæs/