<p><strong>Noun</strong></p><ul><li>plural (especially collectively) sail·fish, (especially referring to two or more kinds or species) sail·fish·es.</li><li>a large tropical and subtropical marine fish, Istiophorus platypterus, of the family Istiophoridae, distinguished by a long, high dorsal fin, long pelvic fins, and a double keel on each side of the tail.</li><li>any of several related fishes having a high dorsal fin.</li></ul><p><strong>End of Response</strong></p>