Noun

• S: (n) motor (machine that converts other forms of energy into mechanical energy and so imparts motion)
• S: (n) motor (a nonspecific agent that imparts motion) "happiness is the aim of all men and the motor of all action"

Verb

• S: (v) drive, motor (travel or be transported in a vehicle) "We drove to the university every morning"; "They motored to London for the theater"

Adjective

• S: (adj) centrifugal, motor (conveying information to the muscles from the CNS) "motor nerves"
• S: (adj) motive, motor (causing or able to cause motion) "a motive force"; "motive power"; "motor energy"