nounpl. -·fish· or -·fish·es (see fish)
any of various fishes with long, narrow jaws that resemble a beak, as many gars or swordfish; esp., any of a family (Istiophoridae) of percoid fishes, as the marlin
nounpl. billfish, or bill·fish·es
- Any of various marine fishes having an elongated spearlike or swordlike upper jaw, including the marlins, sailfishes, and spearfishes of the family Istiophoridae and the swordfish of the family Xiphiidae.
- Any of various fishes having long, pointed jaws, such as the needlefishes.
(plural billfishes or billfish)
- Any of several fish, of the family Istiophoridae, that have an elongated jaw