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English definition of “up”

up

noun     /ʌp/
on the up (and up) UK improving or increasing: It's only a small business but it's definitely on the up. House prices are still on the up.
on the up and up US used to describe something that is done legally or honestly: Do you feel everything with the governor's land deal was done on the up and up? Drug makers face at least one major challenge: convincing consumers that ads are on the up and up.
ups and downs the normal good times and bad times that happen in any situation or period: Luard was looking to buy a new business to balance his other companies' dependence on the ups and downs of the oil sector. The magazine industry has had its ups and downs.
(Definition of up noun from the Cambridge Business English Dictionary © Cambridge University Press)
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