plural motors
1
: a machine that produces motion or power for doing work
a gasoline motor [=engine]
electric motors
2
chiefly British, informal + old-fashioned
: car
always used before a noun
1
a
: of, relating to, used in, or involving a vehicle that is powered by a motor (such as a car or motorcycle)
a motor mechanic/trip/accident
motor fuel/oil
motor racing/sports
b
: having a motor
a motor [=motorized] cart
2
technical
: of or relating to the part of the nervous system that controls the movement of muscles
motor nerves/activities
motor areas of the brain
a motor reaction
motors; motored; motoring
always followed by an adverb or preposition
Cite this Entry
“Motor.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/motor. Accessed 18 Jun. 2026.
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