I. adverb
in or into the open air
went outdoors for some fresh air
Synonyms: out, out of doors, outside, without, withoutdoors
Antonyms: indoors, inside, withindoors
II. noun plural but singular in construction
the space where air is unconfined
every night he let the dog run in the outdoors
Synonyms: open, open air, out-of-doors, outside, without
Idioms: God's good ( or green) earth