Definition of volume noun from the Oxford Advanced American Dictionary

        

    volume

     noun
    noun
    NAmE//ˈvɑlyəm//
     
    , NAmE//ˈvɑlyum//
     
     
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  1. 1[uncountable, countable] the amount of space that an object or a substance fills; the amount of space that a container has How do you measure the volume of a gas? jars of different volumes Wait until the dough doubles in volume before kneading it again.
  2. 2[uncountable, countable] the amount of something the sheer volume (= large amount) of business This work has grown in volume recently. New roads are being built to cope with the increased volume of traffic. Sales volumes fell 0.2% in June.
  3. 3[uncountable] the amount of sound that is produced by a television, radio, etc. to turn the volume up/down
  4. 4[countable] (abbreviation vol.) a book, that is part of a series of books an encyclopedia in 20 volumes
  5. 5 [countable] (formal) a book a library of over 50,000 volumes a slim volume of poetry
  6. 6[countable] (abbreviation vol.) a series of different issues of the same magazine, especially all the issues for one year New Scientist volume 142, number 3
  7. Idioms
    speak volumes (about/for something/somebody)
     
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    to tell you a lot about something or someone, without the need for words His achievement speaks volumes for his determination. What you wear speaks volumes about you.
See the Oxford Advanced Learner's Dictionary entry: volume