A very large oceanic fish (Xiphias gladius), the only representative of the family Xiphiidæ. It is highly valued as a food fish. The bones of the upper jaw are consolidated, and form a long, rigid, swordlike beak; the dorsal fin is high and without distinct spines; the ventral fins are absent. The adult is destitute of teeth. It becomes sixteen feet or more long.
- A large marine food and game fish (Xiphias gladius) having a long swordlike extension of the upper jaw that is used chiefly as a means of defense and attack.