The verb restrict has 4 senses (first 4 from tagged texts)
1. (9) restrict, curtail, curb, cut back -- (place restrictions on; "curtail drinking in school")
2. (5) restrict -- (place under restrictions; limit access to; "This substance is controlled")
3. (4) restrict, restrain, trammel, limit, bound, confine, throttle -- (place limits on (extent or access); "restrict the use of this parking lot"; "limit the time you can spend with your friends")
4. (2) qualify, restrict -- (make more specific; "qualify these remarks")