Dictionary.net

hold in a tight grasp; "The boxer clinched his opponent"; "clench a steering wheel"

(in boxing) the act of one boxer holding onto the other to avoid being hit and to rest momentarily

(boxing) the act of one boxer holding onto the other to avoid being hit and to rest momentarily

the flattened part of a nail or bolt or rivet

settle conclusively; "clinch a deal"

flatten the ends (of nails and rivets); "the nails were clinched"

secure or fasten by flattening the ends of nails or bolts; "The girder was clinched into the wall"

embrace amorously

hold in a tight grasp; "clench a steering wheel"

hold a boxing opponent with one or both arms so as to prevent punches

A pun.

To hold firmly; to hold fast by grasping or embracing tightly.

To bend or turn over the point of (something that has been driven through an object), so that it will hold fast; as, to clinch a nail.

To make conclusive; to confirm; to establish; as, to clinch an argument.

To hold fast; to grasp something firmly; to seize or grasp one another.

The act or process of holding fast; that which serves to hold fast; a grip; a grasp; a clamp; a holdfast; as, to get a good clinch of an antagonist, or of a weapon; to secure anything by a clinch.

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 pun.

To hold firmly; to hold fast by grasping or embracing tightly.

To bend or turn over the point of (something that has been driven through an object), so that it will hold fast; as, to clinch a nail.

To make conclusive; to confirm; to establish; as, to clinch an argument.

To hold fast; to grasp something firmly; to seize or grasp one another.

The act or process of holding fast; that which serves to hold fast; a grip; a grasp; a clamp; a holdfast; as, to get a good clinch of an antagonist, or of a weapon; to secure anything by a clinch.

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.

To rivet; to fasten; to nail; double up tightly, as the fingers; to hold fast; to render unanswerable, as an argument.

Anything that holds both ways.

To fasten or rivet a nail: to grasp tightly: to settle or confirm.

To fasten a nail by bending the point; to fix or confirm.

To fasten, as a driven nail, by bending down the point; confirm, as a bargain or an argument.

To grapple; clench.

A clinching, or that which clinches or is clinched; a decisive argument.

Clincher.

n. Act of holding fast, or that which serves to hold fast; —a word used in a double meaning; a pun; —a kind of knot.

A pun, an ambiguity.