[AS., from L. mulus.] An animal which is a half-breedb etween the male ass and female horse. The head, ears, and tail resemble those of the ass, but in bulk and height the mule is nearer the horse. It is very sure-footed, and of great value for traveling in mountainous countries. Mules are largely used as beasts of burden in Spain, Portugal, Italy, and Spanish America; and in some of the southern States of North America they are employed for work on plantations. In recent wars mules have been found most useful transport animals. .