WordWeb Online

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";
   - out-of-door, outside
    
2. Pertaining to or concerning the outdoors or outdoor activities
   "outdoor education is the area of teacher training concerned with training for outdoor activities"

See also: alfresco, exterior, open-air, outdoorsy

Antonym: indoor

Encyclopedia: Outdoor