As nouns the difference between lady and gentlemen
is that
lady is an aristocratic title for a woman; the wife of a lord and/or a woman who holds the position in her own right; a title for a peeress, the wife of a peer or knight, and the daughters and daughters-in-law of certain peers while
gentlemen is .
As a proper noun lady
is the title for the (primary) female deity in female-centered religions.