Definition of "trimotor" []

• That has three motors, especially an aircraft with three piston engines. (adjective)
• An aircraft with three piston motors. (noun)

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• "Mostly these competitors were corporate-funded, multi-engine aircraft, and they tended toward the luxurious: A Sikorski trimotor was outfitted with a meal of roast Long Island duck, to be consumed upon arrival in Paris."
• "Spanish engineer and inventor Juan de la Cierva was one of the first to decide that adding a rotor to an ordinary airplane could make it safer, a goal he set for himself in 1919 after a trimotor plane he had designed stalled and crashed."
• "The aircraft was a German trimotor Fokker, a frame of steel covered with corrugated sheets of aluminum."