1. 
[syn: overestimate, overrate]
The Collaborative International Dictionary of English v.0.48:
Overrate \O`ver*rate"\, v. t. [imp. & p. p. Overrated; p. pr.
   & vb. n. Overrating.]
   To rate or value too highly; to overestimate.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Overrate \O"ver*rate`\, n.
   An excessive rate. [R.] --Massinger.
   [1913 Webster]
WordNet (r) 3.0 (2006):
overrate
    v 1: make too high an estimate of; "He overestimated his own
         powers" [syn: overestimate, overrate] [ant:
         underestimate, underrate]