noun (plural trout; also trouts) see: troglodyte Date: before 12th century any of various salmonid food and sport fishes that are mostly smaller than the typical salmons and are anadromous or restricted to cool clear freshwater:, any of various Old or New World fishes (genera Salmo and Oncorhynchus ), char I, any of various fishes (as the largemouth bass) held to resemble the true trouts
