Definition of outdoor:
airy, the open air, exterior, outdoorsy, out, invigorating, out in the open, free and easy, unrestricted, healthful, beyond, outside, nature-loving, free, alfresco, out of the house, open-air, picnic, rustic, external, out-of-doors, given to outdoor sports, outdoors, out-of-door, informal, outer.
- "Autobiography of Andrew Carnegie", Andrew Carnegie.
- "Analyzing Character", Katherine M. H. Blackford and Arthur Newcomb.
- "The Depot Master", Joseph C. Lincoln.