trout /tɹʌʊt/noun 2verb 2forms 3 noun2 •Any of several species of fish in Salmonidae, closely related to salmon, and distinguished by spawning more than once.Many anglers consider trout to be the archetypical quarry. •(UK, offensive) An objectionable elderly woman.Look, you silly old trout, you can't keep bringing home cats! You can't afford the ones you have! verb2 •To fish for trout.We found not more than three birds in any one place, and many times only one old bird, and this where we knew they had bred, for our pointer Rex found them while we were trouting. — 1908 •To (figuratively) slap someone with a slimy, stinky, wet trout; to admonish jocularly. formstrouted · trouting · trouts