a person, usually a married or older woman, who, for propriety, accompanies a young unmarried woman in public or who attends a party of young unmarried men and women.
any adult present in order to maintain order or propriety at an activity of young people, as at a school dance.
a round headdress of stuffed cloth with wide cloth streamers that fall from the crown or are draped around it, worn in the 15th century.