racing
n. uncountablen. the sport or activity of competing in races to see who is the fastest. You can use this for people, animals, or vehicles like cars and bikes.
n. the activity or sport of competing in contests of speed. Often used as a modifier in compound nouns to specify the type of competition.
Horse racing is a very popular sport in many countries.
The city closes several main streets every summer to host professional bicycle racing.
Advancements in automotive engineering are frequently driven by the high-stakes environment of professional racing, where marginal gains in aerodynamics can determine the season's victor.
By surface analysis, race + -ing.
Primarily uncountable when referring to the sport; often functions as an attributive noun in phrases like 'racing car' or 'racing driver'.