What is the meaning of Touché?

An acknowledgement of a hit.

An acknowledgement of the validity, appropriateness, or superiority of an opponent's argument or statement in a discussion.

past participle of toucher

(Can we clean up this sense?) A six-point score occurring when the ball enters possession of a team's player in the opponent's end zone.

to touch

touché

touché

Source: wiktionary.org