located, suited for, or taking place in the open air
Outdoor clothes. Badminton and other outdoor games. A beautiful outdoor setting for the wedding.
source: WordNet 3.0
pertaining to or concerning the outdoors or outdoor activities
Outdoor education is the area of teacher training concerned with training for outdoor activities.
source: WordNet 3.0
Being, or done, in the open air; being or done outside of certain buildings, as poorhouses, hospitals, etc.; as, outdoor exercise; outdoor relief; outdoor patients.
