Undefeated; having not lost any matches or contests (used for teams, players, records).
チームは今シーズン無敗でリーグ首位に立っている。
The team is undefeated this season and sits at the top of the league.
彼はプロデビュー以来、公式戦で無敗を保っている。
Since his professional debut he has remained undefeated in official matches.
無敗の記録は次の試合で途切れるかもしれない。
The undefeated record might end in the next match.