mule

A backless slipper or shoe, often with a closed toe.

The sterile hybrid offspring of a male donkey and a female horse, characterized by long ears and a short mane.

A sterile hybrid, as between a canary and other birds or between certain plants.

A stubborn person.

A spinning machine that makes thread or yarn from fibers.

A small, usually electric tractor or locomotive used for hauling over short distances.

A person who serves as a courier of illegal drugs.

In mech., a locomotive for towing canal-boats, operated by compressed air, electricity, or steam: so called because it replaces the mules usually used for towing.

A hybrid animal generated between the ass and the horse.

A hybrid in general; a mongrel; a cross between different animals.