noun A solid, more or less rigid object of metal or wood with a uniform cross-section smaller than its length.
The window was protected by steel bars.
noun A solid metal object with uniform (round, square, hexagonal, octagonal or rectangular) cross-section; in the US its smallest dimension is ⁄4 inch or greater, a piece of thinner material being called a strip.
Ancient Sparta used iron bars instead of handy coins in more valuable alloy, to physically discourage the use of money.
noun A cuboid piece of any solid commodity.
bar of chocolate
noun A broad shaft, band, or stripe.
a bar of light
noun A long, narrow drawn or printed rectangle, cuboid or cylinder, especially as used in a bar code or a bar chart.
noun Any of various lines used as punctuation or diacritics, such as the pipe ⟨|⟩, fraction bar (as in 12), and strikethrough (as in Ⱥ), formerly including oblique marks such as the slash.
noun The sign indicating that the characteristic of a logarithm is negative, conventionally placed above the digit(s) to show that it applies to the characteristic only and not to the mantissa.