| eel (¶l) n., pl. eel or eels. 1. Any of various long, snakelike, scaleless marine or freshwater fishes of the order Anguilliformes or Apodes, especially Anguilla rostrata of eastern North America or A. anguilla of Europe, that lack pelvic fins. 2. Any of several similar fishes, such as the lamprey and electric eel. [Middle English ele, from Old English Æl.] |