/ Dictionary / Index O old lady: Meaning and Definition of Find definitions for: old" la'dy Pronunciation: [key] — Informal. Informal. a mother, usually one's own. a wife. a girlfriend or female lover, esp. a female lover with whom one cohabits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Old Kingdom Old Lady of Threadneedle Street Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language