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English definition of “up”

up

adverb, preposition   /ʌp/
A2 towards or in a higher place : He ran up the stairs . She looked up and smiled at me.
A1 vertical or as straight as possible : He stood up. She sat up.
to a greater degree , amount , volume , etc.: Can you turn up the heat ?
used to say that someone completes an action or uses all of something: I used up all my money . Eat up the rest of your dinner .
up the road, street, etc. A2 along or further along the street , road , etc.: They live just up the road .
go, walk, etc. up to someone/something B1 to walk directly towards someone or something until you are next to them: He came straight up to me and introduced himself.
up to 10, 20, etc. B1 any amount under 10, 20, etc.: We can invite up to 65 people .
up to/till/until B1 until a particular time : You can call me up till midnight .
be up to someone B1 If an action or decision is up to someone, they are responsible for doing or making it: I can’t decide for you. It’s up to you.
be up to something informal B1 to be doing or planning something bad : What are you two up to?
(Definition of up adverbpreposition from the Cambridge Essential Dictionary © Cambridge University Press)

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