Search Result for "overconfidence": 
Wordnet 3.0

NOUN (1)

1. total certainty or greater certainty than circumstances warrant;
[syn: certitude, cocksureness, overconfidence]



The Collaborative International Dictionary of English v.0.48:

Overconfidence \O"ver*con"fi*dence\, n.
   Excessive confidence; too great reliance or trust.
   [1913 Webster]


WordNet (r) 3.0 (2006):

overconfidence
    n 1: total certainty or greater certainty than circumstances
         warrant [syn: certitude, cocksureness,
         overconfidence]