soccer, outdoor ball and goal game, also called association football or simply football. The first recorded game probably was that on a Shrove Tuesday in Derby, England, part of a festival to celebrate a victory over a contingent of Roman troops (A.D. 217). By 1175 the Shrove Tuesday soccer game was an annual event.

The sport remained popular for centuries in England under the name football. But the advent of rugby (1823) as a variant led to confusion. The London Football Association was formed (1863) to further the game that emphasized the kicking of the ball. This became known as association football and then, through abbreviation, as soccer. It was rapidly adopted in continental Europe, where it still generally goes under the name football. Other related sports called football are popular in countries including Ireland and Australia.

Soccer is the most popular international team sport, followed by vast, emotional audiences and associated at times with such events as the 1969 "Soccer War" between El Salvador and Honduras and oubreaks of mass hooliganism, notably by British supporters. It has long been secondary in the United States, though, where American football, a descendant primarily of rugby, dominates. Since the 1970s, American soccer has grown at many levels, from childrens' to collegiate; professional soccer, however, has achieved only sporadic success, with the birth and decline of several leagues as fan interest generally lagged. The most recent U.S. professional league, Major League Soccer, played its first season in 1996 and currently has 12 teams.

International competition is regulated by the Fédération Internationale de Football Association (FIFA; founded 1904), which sponsors the quadrennial (since 1930) World Cup competition and whose membership is larger than that of the United Nations. Soccer has been an Olympic event since 1900. The first Women's World Cup, in 1991, was won by the United States, where women's soccer has won more attention than men's; the women's competition was added to the Olympics in 1996. Sparked by these successes, a U.S. professional women's soccer league consisting of eight teams recruited from the best players worldwide began play in 2001, but it folded two years later.

The game is played on a grassy field usually 120 yd by 75 yd (110 m by 70 m). Centered on each end line is a goal, 8 yd (7.3 m) wide by 8 ft (2.4 m) high, backed with netting. A team consists of eleven players—traditionally a goalkeeper, two fullbacks, three halfbacks, and five forwards. Recent variants on these positions include the striker, a forward who remains close to the opponents' goal, and the sweeper, a roving defender. Play is continuous through two 45-min periods, and substitutions are severely limited. Overtime is played in case of a tie, and if no further scoring occurs, the match may be resolved with a series of alternating penalty kicks.

The object of the game is to advance an inflated leather ball—about 28 in. (71 cm) in circumference—into the opponents' goal. The ball is kicked (often dribbled with short kicks) or advanced with other parts of the body, but only the goalkeeper may use the hands. Each goal counts one point. Penalties are various types of free kicks, depending on the infraction; a player may be ejected (without replacement) for a flagrant foul. Perhaps the greatest soccer player of all time is Brazil's Pelé; other modern notables have included David Beckham (England), Franz Beckenbauer (Germany), Diego Maradona (Argentina), and Zinadine Zidane (France).

Game played, predominantly in the U.S. and Canada, on a rectangular field having two goalposts at each end. In the U.S. it is played between two teams of 11 players each. The object is to get an oblong ball, in possession of one side at a time, over a goal line or between goalposts by running, passing, or kicking. A team must advance the ball 10 yards in four attempts (called downs) in order to continue to have the ball for another four downs. A kick through the goalposts (field goal) counts as three points. A run or completed pass over the goal line (touchdown) counts as six points. Following a touchdown, a team may attempt to kick the ball through the goalposts for one additional point or to run or pass the ball over the goal line for two additional points. Gridiron football (so-called because of the markings on the field), derived from rugby and soccer (see football), emerged in the late 19th century as a collegiate sport; the early rules were mostly written by representatives from Yale, Harvard, and Princeton universities. Each year the college football season concludes with a host of bowl games held on and around New Year's Day. Professional football began in the 1890s but did not become a major sport until after World War II. The National Football League was formed in 1922. The NFL is now divided into an American and a National conference; the conference winners compete for the Super Bowl championship. A Football Hall of Fame is located in Canton, Ohio, U.S. Canadian football differs from U.S. football principally by having 12 players on a team rather than 11, employing a larger field, and allowing only three downs to move the ball 10 yards. These variations allow for a more wide-open style of game, with an emphasis on passing. Seealso Canadian Football League.

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or association football or soccer

Game in which two 11-member teams try to propel a ball into the opposing team's goal, using any part of the body except the hands and arms. Only the goalkeeper, when positioned within the penalty area in front of the goal, may use hands and arms. The game's first uniform set of rules was put in place in 1863, when England's Football Association was created. Professional leagues began appearing in the late 1880s, first in England and then in other countries. The Fédération Internationale de Football Association (FIFA) was founded in 1904, and has hosted the World Cup every four years since 1930. Football has been included in the Olympic Games since 1908. Now played on all continents in over 150 nations, with over 40 million registered players, it is the world's most popular ball game. Seealso Australian Rules football; Gaelic football; football, gridiron; and rugby.

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Irish sport, an offshoot of the violent medieval game mêlée. In the modern game, sides are limited to 15 players. Players may not throw the ball but may dribble it with hand or foot and may punch or punt it toward their opponents' goal. Goals count as either one or three points, depending on whether the ball passes above (one) or below (three) a crossbar attached to the goalposts. It is played mostly in Ireland and the U.S.

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Variety of football played between two teams of 18 players. The field is oval, 145–200 yd (135–185 m) long, with four goalposts at each end. A six-point goal is scored when the oval ball is kicked through the two central goalposts. A one-point “behind” is scored when the ball is kicked over the behind line extending between the central and outer goalposts. The game's finest spectacle is the “mark” in which competing players leap, sometimes riding on the back of an opponent, in order to catch the ball directly from the kick of another player. The player making such a catch is awarded a mark, an unhindered kick from behind the spot of the catch. The sport was developed in Melbourne. The Victorian Football League was established in 1896 as the first professional league. It was renamed the Australian Football League in 1990 to reflect the addition of franchises outside of Victoria state.

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