noun “motor”
 singular motor, plural motors
- a device that converts other forms of energy into mechanical energy, resulting in motion 
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 The electric motor powers the wheels of the car.
 - (figurative) a driving force or impetus behind something 
Innovation is the motor of economic growth.
 
adjective “motor”
 base form motor, non-gradable
- relating to movement or muscles that produce movement 
The physical therapist assessed his motor skills after the injury.
 - relating to motor vehicles or cars 
She works in the motor industry designing new car models.
 - powered by a motor or engine 
They enjoyed a weekend trip on a motor yacht along the coast.
 
verb “motor”
 infinitive motor; he motors; past tense motored; past part. motored; ger. motoring
- (informal) to move or proceed rapidly 
The project was motoring along ahead of schedule.
 - (in aviation) to rotate an aircraft engine using the starter without fuel 
The technicians motored the engine to check for mechanical issues.