Invincible or unbeatable; having no equal or unable to be defeated. Can be used literally or figuratively to mean outstanding.
彼のチームは今シーズン無敵だった。
His team was unbeatable this season.
この選手は技術も精神力も高くて無敵に見える。
This player seems invincible with high skill and mental strength.
新作のスマホは機能が充実して無敵の存在だと宣伝されている。
The new smartphone is advertised as an unbeatable product because of its rich features.