sunfish /ˈsʌnˌfɪʃ/noun 2verb 1forms 3 noun2 •Any of various small freshwater fishes of the family Centrarchidae, often with iridescent colours and having a laterally compressed body. •Any of various large marine fishes of the family Molidae that have an oval compressed body. verb1 •Of an animal such as a bull or a horse: to twist the body into a crescent shape and roll back and forth. formssunfished · sunfishing · sunfishes