Bar

noun

1. 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."

2. A solid metal object with uniform (round, square, hexagonal, octagonal or rectangular) cross-section; in the US its smallest dimension is 1/4 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."

3. A cuboid piece of any solid commodity.

   "bar of chocolate"

4. A broad shaft, or band, or stripe.

   "a bar of colour"

5. A long, narrow drawn or printed rectangle, cuboid or cylinder, especially as used in a bar code or a bar chart.