Meaning of “speed” - Learner’s Dictionary

speed

verb us uk /spiːd/ past tense and past participle sped, speeded
speed along/down/past, etc

to move somewhere or happen very fast:

The three men jumped into a car and sped away.
be speeding

to be driving faster than you are allowed to

(Definition of “speed verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)