We found 23 dictionaries that define the word wakefulness:

General (16 matching dictionaries)

1. wakefulness: Merriam-Webster
2. wakefulness: Oxford Learner's Dictionaries
3. wakefulness: Collins English Dictionary
4. wakefulness: Vocabulary.com
5. Wakefulness, wakefulness: Wordnik
6. wakefulness: Cambridge Advanced Learner's Dictionary
7. wakefulness: Wiktionary
8. wakefulness: Dictionary.com
9. Wakefulness: Wikipedia, the Free Encyclopedia
10. wakefulness: Rhymezone
11. wakefulness: Webster's 1828 Dictionary
12. wakefulness: FreeDictionary.org
13. wakefulness: Mnemonic Dictionary
14. wakefulness: TheFreeDictionary.com

Business (1 matching dictionary)

15. wakefulness: Legal dictionary

Computing (1 matching dictionary)

16. wakefulness: Encyclopedia

Medicine (5 matching dictionaries)

17. wakefulness: Merriam-Webster Medical Dictionary
18. Medical Dictionary (No longer online)
19. online medical dictionary (No longer online)
20. wakefulness: Medical dictionary
21. University of Maryland Glossary of Medical Terms (No longer online)

(Note: See wakeful as well.)

Definitions from Wiktionary (wakefulness) ▸ noun:  The state of being wakeful. Similar: sleeplessness, awakedness, watchfulness, awakeness, awakenedness, unwakefulness, consciousness, awareness, witfulness, wokeness, more... Opposite: sleep, slumber, nap Types: drowsy, alert, awake, conscious, arousal, more... Adjectives: full, relaxed, quiet, alert, normal, complete, prior, active, constant, nocturnal, eternal ▸ Words similar to wakefulness ▸ Usage examples for wakefulness ▸ Idioms related to wakefulness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing wakefulness ▸ Words that often appear near wakefulness ▸ Rhymes of wakefulness ▸ Invented words related to wakefulness