Define volume.

Volume is the amount of space occupied by an object or substance, typically measured in cubic units such as liters or cubic meters. It is a physical quantity that describes the three-dimensional size of an object or substance.

Volume is a three-dimensional measure of the amount of space occupied by a substance or an object. It is usually expressed in cubic units, such as cubic meters, cubic centimeters, or liters. Volume can be calculated by multiplying the length, width, and height of an object. For example, the volume of a rectangular prism with a length of 5 cm, a width of 3 cm, and a height of 2 cm is 30 cm³.