noun
plural -dies
[count] a woman who behaves in a polite way
woman
The phrase young lady is used in informal speech as a form of address for a girl or young woman. An angry parent speaking to a daughter, for example, might address her as young lady.
a woman of high social position
a informal :a man's girlfriend
b chiefly Brit old-fashioned :a man's wife
Lady :a woman who is a member of the nobility - used as a title
it ain't over until/till the fat lady sings
US informal - used to say that the final result of something (such as a sports contest) has not yet been decided and could still change