- otter - the fur of an otter
--1 is a kind of fur, pelt
- otter - freshwater carnivorous mammal having webbed and clawed feet and dark brown fur
--2 is a kind of musteline mammal, mustelid, musteline
--2 is a member of Lutra, genus Lutra
--2 has particulars: river otter, Lutra canadensis; Eurasian otter, Lutra lutra - otter - freshwater carnivorous mammal having webbed and clawed feet and dark brown fur