noun.
An obsolete singular of reins.
To govern, guide, or restrain by reins or a bridle.
To restrain; control.
To carry stiffly, as a horse does its head or neck under a bearing-rein.
To obey the reins.
noun.
The strap of a bridle, fastened to the curb or snaffle on each side, by which the rider or driver restrains and guides the animal driven; any thong or cord used for the same purpose. See cut under harness.
noun.
A rope of twisted and greased rawhide.
noun.
plural The handles of blacksmiths' tongs, on which the ring or coupler slides.
noun.
Figuratively, any means of curbing, restraining, or governing; government; restraint.