Definition of "speedster"

speedster

noun
plural speedsters
1. One who is noted for being very fast.
  Quotations
  With Deebo Samuel as their top receiver, they need to give quarterback Jimmy Garoppolo another top target. So they chose Brandon Aiyuk, the speedster from Arizona State.
  2020 April 24, Ken Belson, Ben Shpigel, “Full Round 1 2020 N.F.L. Picks and Analysis”, in New York Time‎
2. A person who speeds (drives fast).
3. A vehicle or other device used for racing.
4. (cricket) A fast bowler.