The Beautiful Game
The game of football is any of several similar team sports, of similar origins which involve, to varying degrees, kicking a ball with the foot in an attempt to score a goal. The most popular of these sports worldwide is association football, more commonly known as just "football" or "soccer".
The word football is applied to whichever form of football is the most popular in each particular part of the world. Hence, the English language word "football" is applied to "gridiron football," a name associated with American football and Canadian football, Australian rules football, Gaelic football, Rugby league, Rugby union and some related games. These variations are known as "codes".