Real Dictionary

soccer
uncountable noun: Soccer is a game played by two teams of eleven players using a round ball. Players kick the ball to each other and try to score goals by kicking the ball into a large net. Outside the USA, this game is also referred to as football.

soccer in American English
a game played with a round ball by two teams, usually of eleven players, on a field with a goal at either end: the ball is moved chiefly by kicking or by using any part of the body except the hands and arms
noun: a form of football played between two teams of 11 players, in which the ball may be advanced by kicking or by bouncing it off any part of the body but the arms and hands, except in the case of the goalkeepers, who may use their hands to catch, carry, thro

soccer in British English
noun: a game in which two teams of eleven players try to kick or head a ball into their opponent's goal, only the goalkeeper on either side being allowed to touch the ball with the hands and arms except in the case of throw-ins