bar line

English Thesaurus

1. a vertical line before the accented beat marking the boundary between musical bars (noun.communication)

hypernym	:	line,
definition	:	a mark that is long relative to its width (noun.communication)

hypernym	:	musical notation,
definition	:	(music) notation used by musicians (noun.communication)

hyponym	:	double bar,
definition	:	notation marking the end of principal parts of a musical composition; two adjacent bar lines (noun.communication)