A Lady

1. (historical) The mistress of a household.
2. A woman of breeding or higher class, a woman of authority.
3. The feminine of lord.
4. A title for someone married to a lord or gentleman.
5. A title that can be used instead of the formal terms of marchioness, countess, viscountess or baroness.
6. (polite or used by children) A woman: an adult female human.
7. (in the plural) A polite reference or form of address to women.
8. (slang) Used to address a female.
9. (ladies' or ladies) Toilets intended for use by women.
10. (informal) A wife or girlfriend; a sweetheart.
11. A woman to whom the particular homage of a knight was paid; a woman to whom one is devoted or bound.
12. (slang) A queen (the playing card).
13. (attributive, with a professional title) Who is a woman.
14. (Wicca) Alternative form of Lady.
15. The triturating apparatus in the stomach of a lobster, consisting of calcareous plates; so called from a fancied resemblance to a seated female figure.
16. (UK, slang) A five-pound note. (Rhyming slang, Lady Godiva for fiver.)
17. (slang, chiefly in the plural) A woman’s breast.
18. (chess, slang, rare) A queen.