/klin"cheuhr/ , n.
1. a person or thing that clinches.
2. a statement, argument, fact, situation, or the like, that is decisive or conclusive: The heat was the clincher that made us decide to leave the city.
3. a nail, screw, etc., for clinching.
4. Auto. a clincher tire.
[ 1485-95; var. of ME clencher (CLENCH + -ER 1 ) ]