Good coaches teach respect for the opposition, love of competition, the value of trying your best, and how to win and lose graciously. — Brooks Clark
competition : active demand by two or more organisms or kinds of organisms for some environmental resource in short supply — Webster
Competition is, in general, a contest or rivalry between two or more entities, organisms, animals, individuals, economic groups or social groups, etc., for territory, a niche, for scarce resources, goods, for mates, for prestige, recognition, for awards, for group or social status, or for leadership and profit. It arises whenever at least two parties strive for a goal which cannot be shared, where one’s gain is the other’s loss (a zero-sum game).
Competition occurs naturally between living organisms which co-exist in the same environment. For example, animals compete over water supplies, food, mates, and other biological resources. Humans usually compete for food and mates, though when these needs are met deep rivalries often arise over the pursuit of wealth, power, prestige, and fame.
Competition is often considered to be the opposite of cooperation, however in the real world, mixtures of cooperation and competition are the norm. Optimal strategies to achieve goals are studied in the branch of mathematics known as games theory. — Wikipedia
Here are links to pages about closely related subjects.
Entertainment Humor, Toy, Hobby, Competition (Game, Sport), Spectacle
Arts Performing, Visual (Architecture), Culinary, Language (Poem), Music, Dance
Belief Hypothesis, Forecast, Rumor, Superstition, Folklore, Faith