bulk noun
1 large size
ADJ. considerable, formidable, huge, massive, sheer I was amazed by the sheer bulk of the creature. | dark, looming, solid
VERB + BULK ease, heave, shift (used about people) He heaved his considerable bulk into the chair.
2 large amount
ADJ. great, large, overwhelming, vast
BULK + NOUN buying, order, purchasing
PREP. in ~ Sugar is imported in bulk from the mainland.
PHRASES the bulk of (= most of) The great bulk of the work has now been done. | buy in bulk It's usually cheaper to buy in bulk.
You can also check other dicts: bulk (English, 中文解释 ), wordnet sense, Collins Definition