A pitch or a sports ground is an outdoor playing area for various sports. The term pitch is most commonly used in British and Australian English, while the comparable term in American and Canadian English is playing field or sports field.
In most sports the official term is field of play, although this is not regularly used by those outside refereeing/umpiring circles. The field of play generally includes out-of-bounds areas that a player is likey to enter while playing a match, such as the area beyond the touchlines in association football and rugby or the sidelines in American and Canadian football, or the "foul territory" in baseball.
The surface of a pitch is most commonly composed of sod (grass), but may also be artificial turf, sand, clay, gravel, concrete, or other materials. A playing field on ice may be referred to as a rink, for example an ice hockey rink, although rink may also refer to the entire building or, in the sport of curling, to either the building or a particular team.
A football pitch (also known as a football field or soccer field) is the playing surface for the game of association football. Made of turf (grass) or artificial turf, its dimensions and markings are defined by Law 1 of the Laws of the Game, "The Field of Play".
All line markings on the pitch form part of the area which they define. For example, a ball on or above the touchline is still on the field of play, and a foul committed over the 16.5-metre (18-yard) line has occurred in the penalty area. Therefore, a ball must completely cross the touchline to be out of play, and a ball must wholly cross the goal line (between the goal posts) before a goal is scored; if any part of the ball is still on or above the line, the ball is still in play.
The field descriptions that apply to adult matches are described below. Note that due to the original formulation of the Laws in England and the early supremacy of the four British football associations within IFAB, the standard dimensions of a football pitch were originally expressed in imperial units. The Laws now express dimensions with approximate metric equivalents (followed by traditional units in brackets), but use of the imperial units remains common in some countries, especially in the United Kingdom.