Meaning of “volume” - Learner’s Dictionary

volume

noun uk us /ˈvɒljuːm/
SOUND [ U ]

B1 the level of sound produced by a television, radio, etc:

to turn the volume up/down
AMOUNT [ U ]

B2 the number or amount of something, especially when it is large:

the volume of work involved
SPACE [ U ]

the amount of space inside an object:

Which of the bottles has the larger volume?
BOOK [ C ]

a book, especially one of a set:

a new dictionary in two volumes

(Definition of “volume” from the Cambridge Learner’s Dictionary © Cambridge University Press)