Plain English Meaning

The lever or knob the pilot moves to make the engine produce more or less power.

Full Definition

A pilot-operated control that regulates the flow of fuel and air into an engine, thereby controlling the engine's power output. In a piston engine, the throttle moves a butterfly valve in the carburetor or fuel-injection system that varies the volume of the fuel-air mixture entering the cylinders. In a turbine engine, the throttle (often called a power lever or thrust lever) controls the fuel flow to the .