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1. To return to some place by driving. It only took us an hour to get here, but with all of this traffic, how long will it take us to drive back? Hey, will any of you guys be driving back to campus soon?
2. To transport someone or something back to some place in a vehicle. In this usage, a noun or pronoun can be used between "drive" and "back." Can any of you guys drive me back to campus soon?
3. To force someone or something to move away from someone or something else. In this usage, a noun or pronoun can be used between "drive" and "back." The ringmaster used a whip to drive the lion back. This tactic should help us to drive back the enemy troops.
drive someone or something back
to force someone or something away; to force someone or something to retreat. The infantry drove the attackers back into the desert. They drove back the invading army. We drove them back to the border.
to go in a vehicle back to where it started. Mary drove back and parked the car where it had been when she started. You drive us there and I'll drive back.