bridle -
headgear for a horse; includes a headstall and bit and reins to give the rider or driver control
headgear stable gear consisting of any part of a harness that fits about the horse's head
harness stable gear consisting of an arrangement of leather straps fitted to a draft animal so that it can be attached to and pull a cart
bit the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit"
cheekpiece either of two straps of a bridle that connect the bit to the headpiece
headstall,
headpiece the band that is the part of a bridle that fits around a horse's head
noseband,
nosepiece a strap that is the part of a bridle that goes over the animal's nose
bridle -
the act of restraining power or action or limiting excess; "his common sense is a bridle to his quick temper"
A bridle is a piece of equipment used to direct a horse. As defined in the Oxford English Dictionary, the "bridle" includes both the headstall that holds a bit that goes in the mouth of a horse, and the reins that are attached to the bit. Headgear without a bit that uses a noseband to control a horse is called a hackamore, or, in some areas, a bitless bridle.
OmegaWiki Dictionary
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bridle A piece of equipment used to control a horse.