[] an invitation (to sth/to do sth)a spoken or written request to sb to do sth or to go somewhere（口头或书面的）邀请◆an invitation to a product demonstration产品展示邀请函◆He accepted the invitation to join the board.他接受了加入董事会的邀请。⨁to extend / issue / withdraw an invitation提出／发出／撤回邀请⨁to accept / decline / turn down / reject an invitation接受／婉拒／回绝／拒绝邀请