Wordnet 3.0
NOUN (1)
1. 
 a woman who was formerly a particular man's wife; 
- Example: "all his exes live in Texas"[syn: ex-wife, ex]
WordNet (r) 3.0 (2006):
ex-wife
    n 1: a woman who was formerly a particular man's wife; "all his
         exes live in Texas" [syn: ex-wife, ex]