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1. A valve that regulates the flow of a fluid, such as the valve in an internal-combustion engine that controls the amount of air-fuel mixture entering the cylinders.
2. A lever or pedal controlling such a valve.
tr.v. throt·tled, throt·tling, throt·tles
a. To regulate the flow of (fuel) in an engine.
b. To regulate the speed of (an engine) with a throttle.
2. To suppress: tried to throttle the press.
3. To strangle (a person); choke.
[Short for throttle valve, from throttle, to strangle, choke, from Middle English throtelen, probably from throte, throat; see throat.]