clincher

Meanings

Plural: clinchers

Noun

• an argument that is conclusive
• a point or fact or remark that settles something conclusively
• a tool used to clinch nails or bolts or rivets
• That which clinches; that which makes something final or firm; a decisive factor.
• A tyre with a bead around the edge to attach to the rim of the wheel when inflated.

Synonyms

decisive factor, determiner, determining factor