- The definition of leonine is someone or something that is like a lion.
An example of a leonine person is a person with a big mane of fluffy hair.
This womans hair could be described as leonine.Licensed from iStockPhoto
Origin: Middle English from Old French leonin from Classical Latin leoninus from leo, lion
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Origin: Middle English, from Old French leonin, from Latin leōnīnus, from leō, leōn-, lion; see Lion .
leonine - Medical Definition