once (http://definr.com/once)

     adj : belonging to some prior time; "erstwhile friend"; "our
           former glory"; "the once capital of the state"; "her
           quondam lover" [syn: erstwhile(a), former(a), once(a),
            onetime(a), quondam(a), sometime(a)]
     adv 1: on one occasion; "once I ran into her" [syn: one time, {in
            one case}]
     2: as soon as; "once we are home, we can rest" [syn: when]
     3: at a previous time; "once he loved her"; "her erstwhile
        writing" [syn: formerly, at one time, erstwhile, erst]