/ahr"es"vee"pee"/ , v. , RSVPed or RSVP'd, RSVPing or RSVP'ing , n. , pl. RSVP's .
v.i.
1. to reply to an invitation: Don't forget to RSVP before Thursday.
n.
2. a reply to an invitation: He sent a lovely bouquet of flowers with his RSVP.
3. (used on an invitation to indicate that the favor of a reply is requested).
Also, R.S.V.P.
[ 1895-1900; r ( épondez ) s ( 'il ) v ( ous ) p ( laît ) please reply ]