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Definitions of keep up
  1. verb
    lengthen or extend in duration or space
    "keep up the good work"

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  2. verb
    keep informed

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  3. verb
    keep in safety and protect from harm, decay, loss, or destruction
    "The old lady could not keep up the building"
    type of:
  4. verb
    maintain a required pace or level
    "He could not keep up and dropped out of the race"
  5. verb
    prevent from going to bed at night
Explanation of keep up
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