the head gear with which a horse is governed and restrained, consisting of a headstall, a bit, and reins, with other appendages.-a restraint; a curb; a check.-the piece in the interior of a gun lock, which holds in place the tumbler, sear, etc.-a span of rope, line, or chain made fast as both ends, so that another rope, line, or chain may be attached to its middle.-a mooring hawser.-to put a bridle upon; to equip with a bridle; as, to bridle a horse.-to restrain, guide, or govern, with, or as with, a bridle; to check, curb, or control; as, to bridle the passions; to bridle a muse.-to hold up the head, and draw in the chin, as an expression of pride, scorn, or resentment; to assume a lofty manner; -- usually with up.