Definition of flounder

< flounder

flour >

floun·der²    (floundr) KEY 

NOUN:
pl. flounder or floun·ders

Any of various marine flatfishes of the families Bothidae and Pleuronectidae, which include important food fishes.

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ETYMOLOGY:
Middle English, from Anglo-Norman floundre, of Scandinavian origin; see plat- in Indo-European roots