/ɡɑʊn/ a woman’s dress, esp. a long one worn on formal occasions, or a long, loose piece of clothing worn over other clothes for a particular purpose: She wore a beautiful satin gown to the senior prom. Students wore black gowns for the graduation ceremonies./ɡɑʊn/ a woman’s dress, esp. a long one worn on formal occasions, or a long, loose piece of clothing worn over other clothes for a particular purpose: She wore a beautiful satin gown to the senior prom. Students wore black gowns for the graduation ceremonies.