in bulk
Synonym discussion
Sense: idiom/1
'In bulk' is the most common everyday phrase for buying many units of a product at once, usually at a discount. 'In large quantities' is more formal and tends to appear in reports or academic writing about trade. 'Wholesale' is narrower — it refers specifically to buying from a distributor who sells to businesses, not to the general public. 'In volume' is used in corporate and manufacturing settings, often as an adverb ('we purchase in volume'). 'En masse' carries a different connotation — it describes people moving or acting together, not goods. For example: 'The school buys stationery in bulk each term' (everyday), 'The factory purchases raw materials in volume to negotiate better contracts' (corporate).
Etymology
The word 'bulk' comes from the Old Norse 'bulki', meaning a heap or cargo. It entered Middle English through Scandinavian trade routes, where merchants referred to goods loaded in large heaps on ships as 'in bulk'. By the 17th century, the phrase was used for any unbroken large quantity of goods, and later expanded to include retail contexts where unpackaged goods are scooped directly from a larger supply.