Otter . ( Of the lat. ) vulg. * Otter , lat. ( lutra ). 1. f. mammal butcher, of three to four decimetres of height and about nine from the snout to the start of the tail, which has about six. head broad and flattened, ears small and round, slender body, short, with the toes together by a membrane, and very soft, thick fur and legs reddish brown. Living on the banks of rivers and streams, feeds on fish, and is being sought for their fur, greatly appreciated in fur. 2. d. skin of this animal.