- a bond signifying union or unity; tie.
- a stroke or brace drawn over a quantity consisting of several members or terms, as , in order to show that they are to be considered together.
- a horizontal line drawn above a group of mathematical terms, used as an alternative to parentheses in mathematical expressions, as in x + ̅ y – z which is equivalent to x + (y – z)
- anatomy
- any bandlike structure, esp one uniting two or more parts
- another name for ligament
- a unifying bond; tie
