invitational /ˌɪnvɪˈteɪʃənəl/

• 1. 

  ADJ An invitational tournament or event is a sports competition in which only players who have been asked to take part can compete. 邀请的 [ADJ n]

  例：

  After all, The Masters is an invitational tournament.

  毕竟，这项大师赛是一场邀请赛。

• 2. 

  N-COUNT Invitational is also a noun. 邀请赛

  例：

  ...a 59-team invitational for field and running events.

  ...一场59支队伍参加的田径邀请赛。