A machine, especially one powered by electricity or internal combustion, that supplies motive power for a vehicle or for some other device with moving parts.

The car's motor was making a strange noise, so I took it to the mechanic.

Informal, chiefly British: a motor vehicle, especially a car.

He bought a second-hand motor for commuting to work.

Physiology: a motor nerve or neuron that conveys impulses producing movement.

Degeneration of the spinal motors can result in muscle weakness.

motorverb

To travel or move by motor vehicle.

We decided to motor down to the coast for the weekend.

To move or proceed at a steady or rapid pace.

The project is motoring along nicely, and we expect to finish ahead of schedule.

motoradjective

Relating to or operated by a motor or motor vehicles.

Motor insurance is mandatory for all car owners.

Physiology: relating to nerves or muscles that produce movement.

The patient suffered damage to the motor neurons controlling the right arm.