Nau″ma‐chy (na̤″mȧ‐ky̆), n. [L. naumachia, Gr. ναυμαχία; ναυ̑σ ship + μάχη fight, battle, μάχεσθαι to fight.] 1. A naval battle; esp., a mock sea fight.
2. (Rom. Antiq.) A show or spectacle representing a sea fight; also, a place for such exhibitions.