stoat

The ermine, Putorius erminea, and other members of that genus when not specified by distinctive names. See ermine, weasel, mink, fitchew, polecat, ferrer.

The ermine in its summer pelage, when it is reddish brown, but with a black tip to the tail. The name is sometimes applied also to other brown weasels.

Mustela erminea, the ermine or short-tailed weasel, a mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip.

the ermine in its brown summer coat with black-tipped tail