floun·der 1 (floundr) intr.v. floun·dered, floun·der·ing, floun·ders 1. To make clumsy attempts to move or regain one's balance. 2. To move or act clumsily and in confusion. See Synonyms at blunder. See Usage Note at founder1. n. The act of floundering. *I know...more than one word. Sorry.