maintain a required pace or level; "He could not keep up
and dropped out of the race"
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" Synonym(s):prolong, sustain, keep up
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 ancient manuscripts" Synonym(s):conserve, preserve, maintain, keep up
keep informed; "He kept up on his country's foreign policies" Synonym(s):keep up, keep abreast, follow
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"
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