cotillion Pronunciation: kO-'til-y&n, k&-
Variant(s): also co·til·lon
/kO-'til-y&n, k&-, ko-tE-(y)On/
Function: noun
Etymology: French cotillon, literally, petticoat, from Old French, from cote coat
1 : a ballroom dance for couples that resembles the quadrille2
: an elaborate dance with frequent changing of partners carried out under the leadership of one couple at formal balls
3 : a formal ball