Search Result for "overexertion": 
Wordnet 3.0

NOUN (1)

1. excessive exertion; so much exertion that discomfort or injury results; 



The Collaborative International Dictionary of English v.0.48:

Overexertion \O"ver*ex*er"tion\, n.
   Excessive exertion; as, he strained his back from
   overexertion.
   [1913 Webster]


WordNet (r) 3.0 (2006):

overexertion
    n 1: excessive exertion; so much exertion that discomfort or
         injury results