noun
three-bout contest; three-game match; best-of-three
Used in sports and martial arts for a match decided by winning two out of three bouts or games.
決勝は三本勝負で行われた。
The final was held as a three-bout contest.
この試合は三本勝負です。
This match is a best-of-three.
Compound of 三 (three), 本 (counter for bouts), and 勝負 (contest).