English definition of “volume”
SOUND [U] › the level of sound produced by a television, radio, etc: to turn the volume up/down
AMOUNT [U] › 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