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up

adverb (NOT IN BED)
 
 
/ʌp/

Definition

B1 not in bed: It's time to get up now! Oh, I've been up all night, finishing my essay.Not sleeping and not unconscious up and about/around to be able to get out of bed and move around again after a period of illness, because your health has improved enoughEnergetic and lively
(Definition of up adverb (NOT IN BED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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