Source : Webster's Revised Unabridged Dictionary (1913)

Noblewoman \No"ble*wom`an\, n.; pl. {Noblewomen}.
   A female of noble rank; a peeress.

Source : WordNet®

noblewoman
     n : a woman of the peerage in Britain [syn: {Lady}, {peeress}]
         [ant: {Lord}, {Lord}]