Sleep″er (?), n. 1. One who sleeps; a slumberer; hence, a drone, or lazy person.
2. That which lies dormant, as a law. Bacon.
3. A sleeping car.
4. (Zoöl.) An animal that hibernates, as the bear.
5. (Zoöl.) (a) A large fresh-water gobioid fish (Eleotris dormatrix). (b) A nurse shark. See under Nurse.