also: だいしあい
big match; important game
Refers to a high-stakes or highly anticipated sports match or competition.
Tomorrow is finally the big match.
He always performs well in important games.
Standard kanji spelling; the reading おおしあい is more common than だいしあい.
Alternate reading; less common but still used.
Compound of 大 (big, great) and 試合 (match, game).