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Meaning of “up to” in the English Dictionary

"up to" in British English

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up toadverb

uk   /ˈʌp ˌtuː/  us   /ˈʌp ˌtuː/

up topreposition

uk   /ˈʌp ˌtuː/  us   /ˈʌp ˌtuː/
  • 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 ​suspicioushanging around ​outside - I'm ​sure he's up to something.
(Definition of up to from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"up to" in American English

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up toadverb

 us   /ˈʌp tu, /
less than or ​equal to, but not more than, a ​statedvalue, ​number, ​level, or ​time: Research ​suggests that up to ​half of those who were ​prescribed the ​drugsufferedsideeffects. You have up to ten ​minutes.

up topreposition

 us   /ˈʌp tu, /
  • up to preposition (RESPONSIBILITY)

being the ​responsibility of (someone): The ​decision is up to you. If it were up to me, I’d do it.
  • up to preposition (DOING)

doing (something that might be ​bad or ​illegal), often ​secretly: When it’s so ​quiet, I ​think the ​kids are up to something.
(Definition of up to from the Cambridge Academic Content Dictionary © Cambridge University Press)
Translations of “up to”
in Chinese (Simplified) 接近于, 至多…
in Chinese (Traditional) 接近於, 至多…
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