cotillion UK /kəʊtɪlˈjɒ̃/US /koʊtɪlˈjɑ̃/noun 4verb 1forms 3 noun4 •A bold dance performed in groups of eight where women lift their skirts to display their ankles.Mrs. Hughes now joined them, and asked Miss Tilney if she was ready to go. "I hope I shall have the pleasure of seeing you again soon," said Catherine. "Shall you be at the cotillion ball tomorrow?" — 1803 •(US) Ellipsis of cotillion ball.But now, WASP's want their place in the multicultural sun. Social rituals are social rituals. If there is Kwanzaa, why not cotillions? — 1997 •The music regulating the cotillion. •A kind of woollen material for women's skirts. verb1 •(rare) To dance the cotillion. formscotillioned · cotillioning · cotillions