From Longman Dictionary of Contemporary Englishracerrac‧er /ˈreɪsə $ -ər/ noun [countable] someone who competes in a race
Examples from the Corpus
racer• Auto racer Dale Earnhardt, killed two weeks ago in the Daytona 500, came in sixth with $ 24.5 million.• Now, the 25-year-old stock car racer is on the road to recovery after emerging from a coma.• a motorcycle racer• It will kick off with a seminar on diet and fitness before looking at every aspect of becoming a successful pro racer.• In either case Kasper could only have got there, like many of the top racers, on crutches.• Nine of the world's top wheelchair racers due to take part have best times up to 18 minutes inside the restriction. 