To extend in space or length; as, to prolong a line.

To lengthen in time; to extend the duration of; to draw out; to continue; as, to prolong one's days.

lengthen in time; cause to be or last longer; "We prolonged our stay"; "She extended her visit by another day"; "The meeting was drawn out until midnight"

lengthen or extend in duration or space; "We sustained the diplomatic negociations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"