Source : Webster's Revised Unabridged Dictionary (1913)

Out-of-door \Out`-of-door"\, a.
   Being out of the house; being, or done, in the open air;
   outdoor; as, out-of-door exercise. See {Out of door}, under
   {Out}, adv.

         Amongst out-of-door delights.            --G. Eliot.

Source : WordNet®

out-of-door
     adj : located, suited for, or taking place in the open air;
           "outdoor clothes"; "badminton and other outdoor games";
           "a beautiful outdoor setting for the wedding" [syn: {outdoor(a)},
            {outside}] [ant: {indoor(a)}]