We found 20 dictionaries that define the word out-of-doors:

General (16 matching dictionaries)

1. out-of-doors: Merriam-Webster
2. out-of-doors: American Heritage Dictionary of the English Language
3. out-of-doors, out-of-doors: Collins English Dictionary
4. out-of-doors: Vocabulary.com
5. out-of-doors: Wordnik
6. out-of-doors: Wiktionary
7. out-of-doors: Webster's New World College Dictionary, 4th Ed.
8. out-of-doors: Infoplease Dictionary
9. out-of-doors: Dictionary.com
10. out-of-doors: Cambridge Essential American English Dictionary
11. out-of-doors: Rhymezone
12. out-of-doors: FreeDictionary.org
13. out-of-doors: Mnemonic Dictionary
14. out-of-doors: TheFreeDictionary.com

Business (1 matching dictionary)

15. out-of-doors: Legal dictionary

Computing (1 matching dictionary)

16. out-of-doors: Encyclopedia

Medicine (1 matching dictionary)

17. out-of-doors: Medical dictionary

Miscellaneous (1 matching dictionary)

18. out-of-doors: Idioms

(Note: See out-of-door as well.)

Definitions from Wiktionary (out-of-doors) ▸ adverb:  outdoors; outside. ▸ noun:  outdoors ▸ adjective:  (archaic) Primarily in the open rather than under the cover of habitation. Similar: open air, open, air, outdoors, alfresco, outerly, outwards, outwardly, through, afield, more... Opposite: indoors, inside, interior ▸ Words similar to out-of-doors ▸ Usage examples for out-of-doors ▸ Idioms related to out-of-doors ▸ Wikipedia articles (New!) ▸ Popular adjectives describing out-of-doors ▸ Popular nouns described by out-of-doors ▸ Words that often appear near out-of-doors ▸ Rhymes of out-of-doors ▸ Invented words related to out-of-doors