the rate at which someone or something moves or operates or is able to move or operate

we turned on to the runway and began to gather speed

an engine running at full speed

the car has a top speed of 147 mph

each of the possible gear ratios of a bicycle or motor vehicle

the light-gathering power or f-number of a camera lens

an amphetamine drug, especially methamphetamine

success; prosperity

wish me good speed

move quickly

I got into the car and home we sped

make prosperous or successful

may God speed you

take or be under the influence of an amphetamine drug

more kids than ever are speeding, tripping, and getting stoned