Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for motor from the 1913 edition of Webster's Revised Unabridged Dictionary. Define motor using one of the most comprehensive free online dictionaries on the web.

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motor
Part of Speech: noun
Results: 5
1. One who, or that which, imparts motion; a source of mechanical power.
2. A prime mover; a machine by means of which a source of power, as steam, moving water, electricity, etc., is made available for doing mechanical work.
3. A motor car; an automobile.
5. A type of internal- combustion engine in which the air drawn in by the suction stroke is so highly compressed that the heat generated ignites the fuel ( usually crude oil), the fuel being automatically sprayed into the cylinder under pressure. The Diesel engine has a very high thermal efficiency.
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