Volume is the amount of space occupied by any three-dimensional solid. It is measured in cubic units such as m³, cm³, in³, etc. Volume is also known as the capacity of an object. The volume of an object can help determine the amount required to fill that object, like the amount of water needed to fill a bottle, an aquarium, or a water tank. Different three-dimensional objects have different shapes, and their volumes are also variable. For example, a spheres volume is calculated using its radius, while the volume of a cube is calculated using the length of its side.

Volume is measured by multiplying the area of the shape with its third dimension. For instance, the volume of a cuboid with dimensions of 10cm x 3cm x 5cm is calculated by multiplying its length, width, and height: V = 10cm x 3cm x 5cm = 150 cubic centimeters.

Volume is also used in science to describe the quantity of three-dimensional space occupied by a liquid, solid, or gas. In this context, it is measured in units like liters, ounces, gallons, etc.

In summary, volume is a measure of the amount of space occupied by a three-dimensional object, and it is measured in cubic units.