Resembling a marten or weasel; of or pertaining to the Mustelinæ, or, in a broader sense, to the Mustelidæ or weasel family.Specifically, tawny, like a weasel in summer; fawn-colored.n. A musteline mammal; a member of the Mustelinæ.Dogfish-like; of or pertaining to the Mustelinæ.n. A musteline fish.