A bar or stroke is a modification consisting of a line drawn through a grapheme. It may be used as a diacritic to derive new letters from old ones, or simply as an addition to make a grapheme more distinct from others. It can take the form of a vertical bar, slash, or crossbar.
A stroke is sometimes drawn through the numbers 7 and 0, to make them more distinguishable.
In phonetic transcription, a stroke through a letter often indicates that the sound is a fricative.
For the specific usages of various letters with bars and strokes, see their individual articles.
In Unicode, there are bars at U+0335 ◌̵ COMBINING SHORT STROKE OVERLAY, U+0336 ◌̶ COMBINING LONG STROKE OVERLAY, U+0337 ◌̷ COMBINING SHORT SOLIDUS OVERLAY, and U+0338 ◌̸ COMBINING LONG SOLIDUS OVERLAY.
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