leopard Definition

leopard
noun

1. A large member of the cat family, native to Africa and Asia, which has tawny yellow fur covered with small black spots, and whitish underparts. Sometimes called the panther.
2. The male of this animal.
(N Amer)
3. The jaguar or any similar kind of big cat. See snow leopard.

Idiom: leopards don't change their spots (leopards can't change their spots)

People's personality traits, ways of doing things, etc do not change.

Etymology: 13c: Greek leon lion + pardos panther, because the animal was once thought to have been the result of these two interbreeding.