invitational

邀请制的、限受邀者参加的多用于体育赛事

The tournament is invitational, so only ranked players may enter.

这场赛事采邀请制，只有排名内的选手才能参加。

邀请赛

She won the junior invitational for the third year in a row.

她连续三年拿下青少年邀请赛的冠军。