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English definition of “bulk”

bulk

noun [U]  /bʌlk/ us  
something very large, or a large amount, not divided into smaller parts: Tankers carry bulk shipments of oil. We buy a lot of our groceries in bulk (= in large quantities) to save money. The bulk of something is the larger part of it: He gave the bulk of his paintings to the museum.
(Definition of bulk from the Cambridge Academic Content Dictionary © Cambridge University Press)
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