- 1an animal that has a horse and a donkey as parents, used especially for carrying loads He's as stubborn as a mule.
- 2(slang) a person who is paid to take drugs illegally from one country to another The authorities believe these men are important figures in the drug trade, not merely mules.
- 3a slipper (= a soft shoe for wearing indoors) that is open around the heel
Check pronunciation: mule