- a gear that at a certain speed automatically reduces an engine's power output without reducing its driving speed: used to lessen fuel consumption and engine wear
- Informal a state of intensified activity, productivity, etc.
- 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.
transitive verbo·ver·drove , o·ver·driv·en , o·ver·driv·ing, o·ver·drives
- To drive (a vehicle) too far or too long.
- To push (oneself) too far, as in the performance of tasks.
(usually uncountable, plural overdrives)
- (dated) A gear, on an automobile, higher than the normal top gear.
- A state of heightened activity.
(third-person singular simple present overdrives, present participle overdriving, simple past overdrove, past participle overdriven)
- To drive too hard, or far, or beyond strength.