What is the meaning of racing?

noun

• The sport of engaging in contests of speed.

verb

• Move fast.
  • usage: "He rushed down the hall to receive his guests"; "The cars raced down the street"
  • synonyms: rush, hotfoot, hasten, hie, speed, race, pelt along, rush along, cannonball along, bucket along, belt along, step on it
• Compete in a race.
  • usage: "he is running the Marathon this year"; "let's race and see who gets there first"
  • synonyms: race, run
• To work as fast as possible towards a goal, sometimes in competition with others.
  • usage: "We are racing to find a cure for AIDS"
  • synonyms: race
• Cause to move fast or to rush or race.
  • usage: "The psychologist raced the rats through a long maze"
  • synonyms: race, rush