Source : Webster's Revised Unabridged Dictionary (1913)

Gentlewoman \Gen"tle*wom`an\, n.; pl. {Gentlewomen}.
   1. A woman of good family or of good breeding; a woman above
      the vulgar. --Bacon.

   2. A woman who attends a lady of high rank. --Shak.

Source : WordNet®

gentlewoman
     n : a woman of refinement; "a chauffeur opened the door of the
         limousine for the grand lady" [syn: {dame}, {madam}, {ma'am},
          {lady}]