Several codes of football. Images, from top to down, left to right: Association football Australian rules football, international rules football, a rugby union scrum, rugby league, and American football.
Football is a family of team sports that involve, to varying degrees, kicking a ball with a foot to score a goal. Unqualified, the word football is understood to refer to whichever form of football is the most popular in the regional context in which the word appears. Sports commonly called football in certain places include association football gridiron football Australian rules football; rugby football and Gaelic football. These different variations of football are known as football codes.