1) How kangaroos travel 2) Not out of play 
[Basketball] the area within the end lines and sidelines of the court; also the act of bringing the ball into this area by means of a throw-in.
Terrain lying within the boundaries of a ski area that is subject to avalanche control and other safety measures. Also spelled in-bounds.
being within the boundaries of a court or field. · of or pertaining to passing the ball onto the court from out of bounds.