definition of
keep up

[1] #1 keep up v. maintain a required pace or level; "He could not keep up and dropped out of the race". wn

[2] #2 keep up v. lengthen or extend in duration or space; "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work". wn

[3] #3 keep up v. 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"; "children must be taught to conserve our national heritage"; "The museum curator conserved the an. wn

[4] #4 keep up v. keep informed; "He kept up on his country's foreign policies". wn

[5] #5 keep up v. 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". wn