The Collaborative International Dictionary of English v.0.48:
Dressmaker \Dress"mak`er\, n. A maker of gowns, or similar garments; a mantuamaker. [1913 Webster]WordNet (r) 3.0 (2006):
dressmaker n 1: someone who makes or mends dresses [syn: dressmaker, modiste, needlewoman, seamstress, sempstress]