/sun"fish'/ , n. , pl. ( esp. collectively ) sunfish , ( esp. referring to two or more kinds or species ) sunfishes .
1. the ocean sunfish, Mola mola.
2. any of various other fishes of the family Molidae.
3. any of several small, brightly colored, spiny-rayed freshwater fishes of the genus Lepomis, of North America, having a deep, compressed body.
[ 1620-30; SUN + FISH ]