What is the meaning of Bridle?

The headgear with which a horse is directed and which carries a bit and reins.

A restraint; a curb; a check.

A length of line or cable attached to two parts of something to spread the force of a pull, as the rigging on a kite for attaching line.

A mooring hawser.

A piece in the interior of a gunlock which holds in place the tumbler, sear, etc.

A gesture expressing pride or vanity.

To put a bridle on.

To check, restrain, or control with, or as if with, a bridle; as in bridle your tongue.

To show hostility or resentment.

To hold up one's head proudly or affectedly.

Alternative form of bridel

Source: wiktionary.org