The Collaborative International Dictionary of English v.0.48:

Rhapsodize \Rhap"so*dize\, v. t. [imp. & p. p. Rhapsodized; p.
   pr. & vb. n. Rhapsodizing.]
   To utter as a rhapsody, or in the manner of a rhapsody
   --Sterne.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rhapsodize \Rhap"so*dize\, v. i.
   To utter rhapsodies. --Jefferson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rhapsodize
    v 1: recite a rhapsody [syn: rhapsodize, rhapsodise]
    2: say (something) with great enthusiasm [syn: rhapsodize,
       rhapsodise]