The definition of a lady is a term used for a woman.
(noun)See lady in Webster's New World College Dictionary
noun pl. ladies
Origin: ME lavedi < OE hlæfdige, lady, mistress < hlaf, loaf + -dige < dæge, (bread) kneader < IE base *dheih-: see dough
adjective
See lady in American Heritage Dictionary 4
noun pl. la·dies
Origin:
Origin: Middle English, mistress of a household
Origin: , from Old English hlǣfdige; see dheigh- in Indo-European roots
. Usage Note: Lady is normally used as a parallel to gentleman to emphasize norms expected in polite society or in situations requiring courtesies: Ladies and gentlemen, your attention please. I believe the lady in front of the counter was here before me. The attributive use of lady, as in lady doctor, is offensive and outdated. When the sex of the person is relevant, the preferred modifier is woman or female. Twice as many members of the Usage Panel in our 1994 survey preferred female and male to woman and man as modifiers in the sentence President Clinton interviewed both and candidates for the position of Attorney General.Learn more about lady