Source : Webster's Revised Unabridged Dictionary (1913)

Seamstress \Seam"stress\ (?; 277), n. [From older seamster,
   properly fem., AS. se['a]mestre. See {Seam}.]
   A woman whose occupation is sewing; a needlewoman.

Source : WordNet®

seamstress
     n : someone who makes or mends dresses [syn: {dressmaker}, {modiste},
          {needlewoman}, {sempstress}]