"limited, confined," 1830, past-participle adjective from restrict. Of government documents, etc., "secret, not for public release" it is recorded from 1944. Related: Restrictedly. The older adjective was simply restrict. In mid-20c. U.S., restricted was a euphemism for "off-limits to Jews" (1947).
Manager: "I'm sorry, Mr. Marx, but we can't let you use the pool; this country club is restricted."
Groucho: "Well, my daughter's only half-Jewish; could she go in up to her knees?" [there are many versions and variations of this story in print, some referencing a son instead, dating to his obituaries in 1977]
early 15c., restrictif, "serving to bind or draw together," specifically, in medicine (Chauliac) "staunching loss of blood, stringent, styptic," from Medieval Latin restrictivus, from Latin restrict-, past-participle stem of restringere "restrict, restrain" (see restriction). In reference to terms, etc., "imposing or implying restriction," 1570s. Related: Restrictively; restrictiveness.
early 15c., restriccioun, "a cessation, the property of staunching bleeding," from Old French restriction (14c.) and directly from Late Latin restrictionem (nominative restrictio) "limitation," noun of action from past-participle stem of Latin restringere "restrict, bind fast, restrain," from re- "back" (see re-) + stringere "draw tight" (see strain (v.)). General sense of "that which restricts" is by early 15c. Meaning "act, process, or fact of restricting; state of being restricted" is from 1620s.
late 14c., "set limits to, restrict within limits" (also "prescribe, fix, assign"), from Old French limiter "mark (a boundary), restrict; specify" (14c.), from Latin limitare "to bound, limit, fix," from limes "boundary, limit" (see limit (n.)). From early 15c. as "delimit, appoint or specify a limit." Related: limited; limiting; limitable.
1520s, "to border on, have a common boundary," a sense now obsolete, from French confiner "to border; to shut up, enclose," which is perhaps from the noun confins (see confines) or from Medieval Latin confinare "border on; set bounds." Sense of "restrict within bounds, keep within limits" is from 1590s. Related: Confined; confining.