Real Dictionary

square dance
countable noun: A square dance is a social event where people dance square dances.
countable noun: A square dance is a traditional American dance in which sets of four couples dance together, forming a square at the beginning of the dance.
noun: any of various formation dances, such as a quadrille, in which the couples form squares
verb: to perform such a dance

square dance in American English
noun: a dance by a set of four couples arranged in a square or in some set form

square-dance in American English
intransitive verb: to perform or participate in a square dance

square-dance in British English
a lively dance with various steps, figures, etc., in which the couples are grouped in a given form, as a square
to perform a square dance