—v.t. 1. to make young again; restore to youthful vigor, appearance, etc.: That vacation has certainly rejuvenated him. 2. to restore to a former state; make fresh or new again: to rejuvenate an old sofa. 3. Physical Geog. a. to renew the activity, erosive power, etc., of (a stream) by uplift or by removal of a barrier in the stream bed.
b. to impress again the characters of youthful topography on (a region) by the action of rejuvenated streams.