Other forms: restrictions
A restriction is a limitation or a restraint, like when a size restriction keeps you from jumping on a toddler trampoline and bouncing the smaller kids a mile up in the air.
Usually a restriction is in place because a limit needs to be set. Common sense would keep you from putting a bowling ball in a paper bag; you wouldn’t need a restriction to tell you not to do it. Sometimes a restriction is the result of doing something bad or misusing a privilege, as when your parents put a restriction on video gaming to limit your time in front of the TV.