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n.
the property of something that is great in magnitude; "it is cheaper to buy it in bulk"; "he received a mass of correspondence"; "the volume of exports"
n.
an event that is substituted for a previously cancelled event; "he missed the test and had to take a makeup"; "the two teams played a makeup one week later"
n.
(computer science) the amount of information (in bytes) that can be stored on a disk drive; "the capacity of a hard disk drive is usually expressed in megabytes"