keep up

verb

1. 1

   prevent from going to bed at night

   The anticipation of the trip kept the children up all night

   I kept myself up all night studying for the exam

2. 2

   keep informed

   He kept up on his country's foreign policies

3. 3

   maintain a required pace or level

   He could not keep up and dropped out of the race

4. 4

   keep in safety and protect from harm, decay, loss, or destruction

   We preserve these archeological findings

   The old lady could not keep up the building

5. 5

   lengthen or extend in duration or space

   We sustained the diplomatic negotiations as long as possible

   prolong the treatment of the patient