The Collaborative International Dictionary of English v.0.48:

Miaul \Mi*aul"\, v. i. [imp. & p. p. Miauled; p. pr. & vb. n.
   Miauling.] [Cf. F. miauler, of imitative origin, and E.
   mew. Cf. Mewl.]
   To cry as a cat; to mew; to caterwaul. --Sir W. Scott.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Miaul \Mi*aul"\, n.
   The crying of a cat.
   [1913 Webster]

WordNet (r) 3.0 (2006):

miaul
    n 1: the sound made by a cat (or any sound resembling this)
         [syn: meow, mew, miaou, miaow, miaul]