To drive too hard, or far, or beyond strength.
- A gearing mechanism of a motor vehicle engine that reduces the power output required to maintain driving speed in a specific range by lowering the gear ratio.
- Informal A state of heightened activity or concentration: shifted into overdrive toward the end of the semester.
- To drive (a vehicle) too far or too long.
- To push (oneself) too far, as in the performance of tasks.