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English definition of “up”

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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 adverb, preposition from the Cambridge Essential Dictionary © Cambridge University Press)
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