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RSVP

or R.S.V.P.

[ahr-es-vee-pee]
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verb (used without object), RSVPed or RSVP'd, RSVPing or RSVP'ing.
  1. to reply to an invitation: Don't forget to RSVP before Thursday.
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noun, plural RSVP's.
  1. a reply to an invitation: He sent a lovely bouquet of flowers with his RSVP.
  2. (used on an invitation to indicate that the favor of a reply is requested).
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Origin of RSVP

1895–1900; < French r(épondez) s('il) v(ous) p(laît) please reply
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for rsvp'ing

RSVP

abbreviation for
  1. répondez s'il vous plaît
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Word Origin

French: please reply
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012