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English definition of “keep up”

keep up

phrasal verb with keep
 
 
/kiːp/ verb (past tense and past participle kept)
SAME SPEED B2 to move at the same speed as someone or something that is moving forward so that you stay level with them: She was walking so fast I couldn't keep up with her.Competing and contending (non-sporting)Competing in sport
MAKE PROGRESS to increase or make progress at the same speed as something or someone else so that you stay at the same level as them: Prices have been rising very fast and wages haven't kept up.Competing and contending (non-sporting)Competing in sport
UNDERSTAND B2 to be able to understand or deal with something that is happening or changing very fast: I feel it's important to keep up with current events.Understanding and comprehending
(Definition of keep up from the Cambridge Learners Dictionary © Cambridge University Press)
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