Definition of RSVP in English:

RSVP

  • Répondez s'il vous plaît; please reply (used at the end of invitations to request a response).

verb

[NO OBJECT]
  • Reply to an invitation indicating whether one plans to attend.

    ‘Are you coming? If you haven't RSVP'd make sure to do so’
    ‘the event is free and open to the public; you just have to RSVP’

Origin

French.

Pronunciation

RSVP

/ɑːrɛsviːˈpiː/