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English definition of “up to”

up to

adverb uk   us  
B1 used to say that something is less than or equal to but not more than a stated value, number, or level: Up to two hundred people were on board the ship. We can teach dancers up to intermediate level here.

up to

preposition uk   us  

up to preposition (UNTIL)

B1 (also up until) until: Up to yesterday, we had no idea where the child was.

up to preposition (RESPONSIBILITY)

be up to sb B1 to be the responsibility of someone: It's up to the manager to make the final decision.

up to preposition (DOING)

be up to sth B1 informal to be doing something, often something bad or illegal, usually secretly: She's up to no good (= doing something bad or forbidden) - you can always tell because she stays in her room. He looks very suspicious hanging around by the bins - I'm sure he's up to something.
(Definition of up to from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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