Meaning

• Any of several fastenings.

• The act or process of holding fast; that which serves to hold fast; a grip or grasp.

  "to get a good clinch of an antagonist, or of a weapon"

• A pun.

• A hitch or bend by which a rope is made fast to the ring of an anchor, or the breeching of a ship's gun to the ringbolts.

• A passionate embrace.

• In combat sports, the act of one or both fighters holding onto the other to prevent being hit or engage in standup grappling.

Meaning

• To clasp; to interlock.

• To make certain; to finalize.

  "I already planned to buy the car, but the color was what really clinched it for me."

• To fasten securely or permanently.

• To bend and hammer the point of (a nail) so it cannot be removed.

• To embrace passionately.

• To hold firmly; to clench.

• To set closely together; to close tightly.

  "to clinch the teeth or the fist"