<p><strong>Noun</strong></p><ul><li>the sterile offspring of a female horse and a male donkey, valued as a work animal, having strong muscles, a body shaped like a horse, and donkeylike long ears, small feet, and sure-footedness</li><li>any hybrid between the donkey and the horse</li><li>Informal: a very stubborn person</li><li>Botany: any sterile hybrid</li><li>Biology: a hybrid, especially one between the canary and some other finch</li><li>Slang: a person paid to carry or transport contraband, especially drugs, for a smuggler</li><li>a small locomotive used for pulling rail cars, as in a coal yard or on an industrial site, or for towing, as of ships through canal locks</li><li>Also called spinning mule: a machine for spinning cotton or other fibers into yarn and winding the yarn on spindles</li><li>Nautical: a large triangular staysail set between two masts and having its clew set well aft</li><li>Numismatics: a hybrid coin having the obverse of one issue and the reverse of the succeeding issue, or vice versa</li></ul>