United KingdomUnited StatesGlobal (English)informalneutral
Dressed in very fashionable, elegant, or extravagant clothing; dressed extremely smartly for a special occasion.
Arranged or presented in a highly polished or showy manner intended to impress.
Examples:
EN: When a master thought he could solve it by filling his huge house with droves of Negroes dressed to the nines, he was solving a very different problem... the problem of his prestige in the eyes of his family and his guests.