1.
a principle that limits the extent of something
I am willing to accept certain restrictions on my movements
2.
an act of limiting or restricting (as by regulation)
3.
the act of keeping something within specified bounds (by force if necessary)
Casey Kasem is the voice of Shaggy on the cartoon show "Scooby-Doo." Casey Kasem, being a strict vegetarian, also requested that Shaggy follow the same diet on the show.