rsvp
US
UK RSVP, R.S.V.P. interj: initialism (invitation: please reply) (缩写，请柬用语)
SC 请回复，敬请赐复 qǐng huí fù，jìng qǐng cì fù
RSVP by the 2nd of August, please!
RSVP, R.S.V.P. vi: informal, initialism (reply to invitation) (缩写，非正式用法)
SC 回复（邀请） huí fù yāo qǐng
The invitation requests that we RSVP by October 1.
RSVP, R.S.V.P. n: informal, initialism (reply to invitation) (缩写，非正式用法)
SC 对邀请的回复 duì yāo qǐng de huí fù
All RSVPs should be sent by email.