Noun
attire to wear on formal occasions in the evening
Source: WordNetLike in the ’30s, Schiaparelli’s heyday, backs were scooped, draped and accentuated in eveningwear, drawing in the eye. Source: Internet
Starting in the 1960s, his elegant eveningwear designs have been donned by every first lady since Jacqueline Kennedy, and his gowns are a perennial presence on red carpets around the world. Source: Internet