From WordNet (r) 3.0 (2006):
ex
adj 1: out of fashion; "a suit of rather antique appearance";
"demode (or outmoded) attire"; "outmoded ideas" [syn:
antique, demode, ex, old-fashioned, old-hat(p),
outmoded, passe, passee]
n 1: a man who was formerly a certain woman's husband [syn: ex-
husband, ex]
2: a woman who was formerly a particular man's wife; "all his
exes live in Texas" [syn: ex-wife, ex]
3: the 24th letter of the Roman alphabet [syn: X, x, ex]