Using the hip to knock a puck carrier off balance, usually as they try to skate past along the boards. It is a body check, so it depends on the rulebook.
Holding an opponent against the boards with your body so they cannot play the puck while a teammate gets it. How much contact is allowed depends on the rulebook and classification.
Teammates swapping spots to cover for a player who has moved, such as a forward dropping to the point when a defenseman pinches. Good rotations keep every area covered.
Riding a puck carrier along the boards with the body to separate them from the puck. What contact is allowed depends on the rulebook and classification.
Either a quick look over the shoulder to see what is behind you, or a body check delivered with the shoulder. The body-check meaning is legal only where the rulebook allows checking.
Playing the opponent's body instead of the puck to separate them from it. Whether that means body contact or body checking depends on the rulebook and classification.