mustelid Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a small carnivorous mammal with a long body, short legs, and thick fur. Example Sentence We saw a mustelid in the woods. Synonyms weasel; otter; mink Antonyms giant; huge Hear It! Say It! Write It! mustelid Switch to cursive Start Share with your friends: