mule /mjuːl/ BrE AmE noun [countable]
[ Sense 1-2: Date: 1200-1300 ; Language: Old French ; Origin: mul , from Latin mulus ]
[ Sense 3: Date: 1500-1600 ; Language: French ; Origin: Latin mulleus type of red shoe worn by certain officials ]
1 . an animal that has a ↑ donkey and a horse as parents ⇨ stubborn as a mule at ↑ stubborn (1)
2 . informal someone who brings illegal drugs into a country by hiding them on or in their body
3 . [usually plural] a woman’s shoe or ↑ slipper that covers the front part of the foot but has no material around the heel