Main entry: keep up
Definition: prevent from going to bed at night
Usage: The anticipation of the trip kept the children up all night; I kept myself up all night studying for the exam
Main entry: keep abreast, keep up, follow
Definition: keep informed
Usage: He kept up on his country's foreign policies
Main entry: keep up
Definition: maintain a required pace or level
Usage: He could not keep up and dropped out of the race
Main entry: preserve, maintain, keep up, conserve
Definition: keep in safety and protect from harm, decay, loss, or destruction
Usage: 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 ancient manuscripts
Main entry: prolong, keep up, sustain
Definition: lengthen or extend in duration or space
Usage: We sustained the diplomatic negotiations as long as possible; prolong the treatment of the patient; keep up the good work