What is define touche?

"Touche" is a French word that is commonly used in English. It is often used as a statement or interjection to acknowledge a clever or effective point made by someone in a discussion or argument. It is often spelled with an accent on the "e" (touché) to indicate its French origin, but this is not always the case in English usage. The word literally means "touched" in French, but has taken on a more metaphorical meaning in English.