n.
Pronunciation: k ō - ' til-y ə n, k ə -
Variant: also co · til · lon \ k ō - ' til-y ə n, k ə -, ko ̇ -t ē -(y) ō n \
Function: noun
Etymology: French cotillon, literally, petticoat, from Old French, from cote coat
Date: 1728
1 : a ballroom dance for couples that resembles the quadrille
2 : an elaborate dance with frequent changing of partners carried out under the leadership of one couple at formal balls
3 : a formal ball