The touch line is the line on either side of the playing area of a games of rugby league

Rugby league

Rugby league football, usually called rugby league, is a full contact sport played by two teams of thirteen players on a rectangular grass field. One of the two codes of rugby football, it originated in England in 1895 by a split from Rugby Football Union over paying players...

, rugby union

Rugby union

Rugby union, often simply referred to as rugby, is a full contact team sport which originated in England in the early 19th century. One of the two codes of rugby football, it is based on running with the ball in hand...

 and association football (soccer). In many other sports it is called a side-line.

The continuation of the touch line beyond the goal line

Goal line

The goal line is the chalked or painted line dividing the end zone from the field of play in American football and Canadian football. It is the line that must be crossed in order to score a touchdown...

 ending at the dead ball line is called the "touch-in-goal line".

In rugby union the two touch lines may not be more than 70m apart and they are not part of the playing area. (Law 1)

• The area beyond the touch-line is touch
  Touch (rugby)
  Touch is the area outside two touch-lines which define the sides of the playing area in a game of rugby football. As the touch-lines are not part of the playing area they are usually included as part of touch....
  
  .
• The officials who monitor the touch lines are the touch judge
  Touch judge
  The touch judge is an official who monitors the touch-line in a game of rugby union or rugby league and raises a flag if the ball goes into touch. Touch judges also stand behind the posts to confirm that a goal has been scored following a penalty kick or conversion of a try...
  
  s