Real Dictionary

restrict
verb: If you restrict someone or their activities to one thing, they can only do, have, or deal with that thing. If you restrict them to one place, they cannot go anywhere else.
verb: If you restrict something to a particular group, only that group can do it or have it. If you restrict something to a particular place, it is allowed only in that place.
verb: If you restrict something, you put a limit on it in order to reduce it or prevent it becoming too great.
verb: To restrict the movement or actions of someone or something means to prevent them from moving or acting freely.

restrict in American English
to keep within certain limits; put certain limitations on; confine
transitive verb: to confine or keep within limits, as of space, action, choice, intensity, or quantity

restrict in British English
verb: to confine or keep within certain often specified limits or selected bounds