(lā′dē) noun plural ·dies
1. A refined and well-bred woman; a gentlewoman.
2. A woman of superior position in society; a woman of good family and recognized social standing.
3. Any woman: in the plural, used as a form of address.
4. The woman who is at the head of or has authority over a household or an estate: the lady of the house; the mistress of a family or manor.
5. A sweetheart; ladylove.
6. Colloq. Wife: the colonel's lady.
—adjective
1. Of or like a lady; becoming to a lady.
2. Female: a lady doctor. ♦ Lady is here a genteelism, as it is in such compounds as saleslady. Woman is the more appropriate word to indicate the feminine gender of these occupational terms: a woman doctor, a saleswoman, etc. [OE hlœfdïge, lit., bread-kneader <hlāf bread, loaf + -dige, a stem akin to dāh dough]

(lā′dē) noun
1. In Great Britain, the title belonging to the wife of any peer below the rank of duke; also given by courtesy to the daughters of dukes, marquises, and earls, and to the wives of lords, baronets, and knights: correlative to Lord or Sir.
2. The Virgin Mary: usually with Our.