1. to make certain of winning or achieving something
2. to hold someone or something tightly
3. to fasten or secure something firmly

1. a tight hold or embrace
2. a decisive factor that settles a matter

Examples

• The team needs one more win to clinch the championship.
• She clinched her fists in anger.
• The carpenter clinched the nail to secure the board.
• The boxer held his opponent in a tight clinch.
• His endorsement was the clinch that won her the election.
• They clinched the deal with a handshake.
• The evidence will clinch the case for the prosecution.