ex

(noun) a man who was formerly a certain woman's husband. Synonyms: ex-husband.

(noun) a woman who was formerly a particular man's wife. Synonyms: ex-wife. Example: "All his exes live in texas."

(noun) the 24th letter of the Roman alphabet. Synonyms: X, x.

(adj) out of fashion. Synonyms: antique, demode, old-fashioned, old-hat(predicate), outmoded, passe, passee. Examples: "A suit of rather antique appearance." "Demode (or outmoded) attire." "Outmoded ideas."