Emily Dickinson Lexicon

LA'DY, n. [Sax. hlafdig, hlæfdiga, hlæfdia. The first syllable of this word occurs in hlaford, lord, and this is supposed to be hlaf, a loaf, and the words to signify bread-givers. But this is doubtful; the meaning of the last syllable not being ascertained in either word.]

1. A woman of distinction. Originally, the title of lady was given to the daughters of earls and others in high rank, but by custom, the title belongs to any woman of genteel education.
2. A word of complaisance; used of women. Guardian.
3. Mistress; the female who presides or has authority over a manor or family.