valentine
/ˈvæləntaɪn; `vælənˌtaɪn/ n
(a) (also valentine card) sentimental or comic greetings card sent, usu anonymously, on St Valentine's Day (14 February) to a sweetheart 在圣瓦伦廷节（2月14日）寄给情人的贺卡（通常匿名）.
(b) sweetheart to whom one sends such a card 收受此类贺卡的情人
Will you be my valentine? 你愿意做我的情人吗?