DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Coot \Coot\ (k[=oo]t), n. [Cf. D. koet, W. cwtair; cwta short,
      bodtailed + iar hen; cf. cwtau to dock. Cf. Cut.]
      1. (Zool.)
         (a) A wading bird with lobate toes, of the genus Fulica.
             The common European or bald coot is Fulica atra (see
             under bald); the American is Fulica Americana.
         (b) The surf duck or scoter. In the United States all the
             species of ([OE]demia are called coots. See
             Scoter. "As simple as a coot." --Halliwell.
             [1913 Webster]
      2. A stupid fellow; a simpleton; as, a silly coot. [Colloq.]
         [1913 Webster]