sui ju·ris \ˌsüˌīˈju̇rə̇s, ˌsüēˈyu̇-\adjective Etymology: Latin, literally, of one's own right or authority 1.: having full legal capacity to act on one's own behalf : not subject to the authority of another — opposed to alieni juris 2.: qualified to enjoy full civil rights (as of holding public office or serving on a jury)