A slang term used to refer to one of the four bases on a baseball diamond.
In the early days of baseball, all bases were made from canvas bags filled with saw-dust or sand. Although they have always been referred to as bases, “bags” is a more literal and still-accurate description.
In modern baseball, first, second and third base are all made of a thick, square canvas bags filled with soft material (usually rubber) that are often coated with rubber on the outside. The bases are to the ground with a stake that extends from the bottom of the base. Home plate is different in that it is made entirely of whitened rubber.