The Collaborative International Dictionary of English v.0.48:

out-of-door \out-of-door\ adj.
   1. located, . indoor

   Syn: outdoor(prenominal) (vs. indoor), outside.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Out-of-door \Out`-of-door"\,, a.
   Being out of the house; being, or done, in the open air;
   suited for the open air; outdoor; as, out-of-door exercise.
   See Out of door, under Out, adv.
   [1913 Webster]

         Amongst out-of-door delights.            --G. Eliot.
   [1913 Webster]

WordNet (r) 3.0 (2006):

out-of-door
    adj 1: 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), out-of-door, outside] [ant:
           indoor(a)]