The lines of play on each side of the field. Also known as the touchlines because when the ball crosses these lines the players may touch the ball with their hands to restart play.
The two longer boundary lines of the field; also called "touchlines".
The lines running the length of the field, from end line to end line, marking the outside boundaries of the field and end zones. The sideline is out of bounds.
The areas along the sides of the field where coaches and non-participating players stand. Any player who runs to a sideline is deemed to be out of bounds, stopping the clock.
2 boundary lines that run the length of the court.
The "sidelines" is a term commonly used to define the white or colored lines which mark the outer boundaries of a sports field. American football sidelines, for example, mark the edge of the field. Should a player pass through the sidelines, he is considered out of bounds.