bulk

US /bʌlk/
UK /bʌlk/
"bulk" picture
1.

the main part of something; the majority

:
•
The bulk of the work is done.
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The bulk of the population lives in cities.
:
majoritymain partgreater partlargest partmass
2.

the size, mass, or volume of something

:
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The sheer bulk of the package made it difficult to carry.
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Despite its small bulk, the device is very powerful.
:
sizemassvolumedimensionsmagnitude
1.

to make something larger or more substantial

:
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He decided to bulk up by lifting weights.
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The company needs to bulk up its inventory before the holiday season.
:
enlargeexpandincreaseswellgrow
:
bulk mail