Of an object or device, esp. a vehicle: able to travel under its own power.

Esp. of a vehicle: having its own means of propulsion, self-propelled; = automobile, adj. Now rare except as merged with sense A. 2.

Propelled by some internal mechanism, self-moving; (esp. of a vehicle) having its own means of propulsion, as opposed to being horse-drawn, pulled…

Prefixed to the names of vehicles with the sense 'self-propelled; powered by motor', as autobus, autocab, autocar, etc.

Without a horse. Applied 1895–1910 to motor vehicles.

Not pulled (in various senses of the verb). Also with up, down.

With reference to a vehicle. Designating a vehicle capable of moving under its own power; motorized, self-propelled. Now rare.

Equipped with or powered by a motor.