Definition of flounder

• n. - A flatfish of the family Pleuronectidae, of many species.
• n. - A tool used in crimping boot fronts.
• v. i. - To fling the limbs and body, as in making efforts to move; to struggle, as a horse in the mire, or as a fish on land; to roll, toss, and tumble; to flounce.
• n. - The act of floundering.