From WordNet (r) 3.0 (2006):
throttle
n 1: a valve that regulates the supply of fuel to the engine
[syn: accelerator, throttle, throttle valve]
2: a pedal that controls the throttle valve; "he stepped on the
gas" [syn: accelerator, accelerator pedal, gas pedal,
gas, throttle, gun]
v 1: place limits on (extent or access); "restrict the use of
this parking lot"; "limit the time you can spend with your
friends" [syn: restrict, restrain, trammel, limit,
bound, confine, throttle]
2: kill by squeezing the throat of so as to cut off the air; "he
tried to strangle his opponent"; "A man in Boston has been
strangling several dozen prostitutes" [syn: strangle,
strangulate, throttle]
3: reduce the air supply; "choke a carburetor" [syn: choke,
throttle]