noun Download 🔗Share 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. Examples : "The stoat darted across the schoolyard, its black-tipped tail a flash of dark against the grass. " animal nature biology ecology Chat with AIVocabulary GamePractice Reading