"motor" in the noun sense
machine that converts other forms of energy into mechanical energy and so imparts motion
a nonspecific agent that imparts motion
"happiness is the aim of all men and the motor of all action"
"motor" in the verb sense
1. drive, motor
travel or be transported in a vehicle
"We drove to the university every morning"
"They motored to London for the theater"
"motor" in the adjective sense
1. centrifugal, motor
conveying information to the muscles from the CNS
2. motive, motor
causing or able to cause motion
"a motive force"
Source: WordNet® (An amazing lexical database of English)
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