A competition to be first to a goal.

• An event of speed, such as a run or motor contest.

A socially constructed category grouping humans by perceived ancestry.

• A classification based on shared physical traits or origin.

A pressing competition or effort to achieve something first.

• An urgent drive toward a goal, often against time.

A bug from concurrent access to a shared resource.

• A timing error when operations interleave unpredictably.

A fast current of water.

• A water channel, especially one feeding a mill.

A guide track or groove along which a part moves.

• The grooved ring in a rolling bearing.

To take part in a race.

• To compete against in a race.

To move or drive very fast; to hurry.

• Of an engine: to run at high speed while disengaged.