match against an outside team; interschool game
Used in sports contexts for a game against a team from another school or organization, as opposed to an intra-squad practice.
We are practicing every day for the interschool match next week.
I played against athletes from another school for the first time in an outside match.
Compound of 対外 (taigai, 'outside, external') and 試合 (jiai, 'match, game').