bar line

/B AA1 R L AY1 N/
noun
  1. 1

    A vertical line in musical notation used to separate two bars or measures.

Synonyms

noun
  1. 1

    A line that crosses other lines.

  2. 2

    A line running across an insect.

  3. 3

    A small headline running across one or more columns, but not extending to the full width of the page.

Synonyms

Source: https://en.wiktionary.org/wiki/bar%20line, https://en.wiktionary.org/wiki/crossline