noun
volume
VOL-yoom
noun
1
How loud a sound is, or the control that adjusts it.
"Could you turn the volume down, please?"
"The speakers distorted at high volume."
2
The amount of three-dimensional space something occupies, measured in cubic units.
"They calculated the volume of water needed to fill the tank."
3
The total amount of something, such as trade, traffic, or sales, over a period.
"Trading volume spiked after the earnings report."
4
A single book, especially one of several forming a set.
"The encyclopedia filled twelve volumes on the shelf."
How to Use Volume
Learner’s notesIn plain EnglishHow loud something is, how much space it takes up, or how much of something there is in total — plus, a single book in a set.
Common pairings
turn up the volume
trading volume
the volume of a container
Word Forms
volumed past tense, volumes plural, volumes singular
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Etymology
From Latin volumen, "a roll" or "scroll," from volvere, "to roll" — ancient books were literally rolled scrolls before the codex format existed.