Definition of "Volume" :

noun: physical objects consisting of a number of pages bound together

noun: the magnitude of sound (usually in a specified direction)

"The kids played their music at full volume."

noun: the property of something that is great in magnitude

"The volume of exports."

noun: a publication that is one of a set of several similar publications

"The third volume was missing."

noun: the amount of 3-dimensional space occupied by an object

"The gas expanded to twice its original volume."

noun: a relative amount

"Mix one volume of the solution with ten volumes of water."