We found 20 dictionaries that define the word involuntariness:

General (14 matching dictionaries)

1. involuntariness: Merriam-Webster
2. involuntariness: Oxford Learner's Dictionaries
3. involuntariness: Collins English Dictionary
4. involuntariness: Vocabulary.com
5. involuntariness: Wordnik
6. involuntariness: Wiktionary
7. Involuntariness, involuntariness: Dictionary.com
8. Involuntariness: Online Plain Text English Dictionary
9. involuntariness: Webster's Revised Unabridged, 1913 Edition
10. Involuntariness: AllWords.com Multi-Lingual Dictionary
11. involuntariness: Webster's 1828 Dictionary
12. involuntariness: FreeDictionary.org
13. involuntariness: Mnemonic Dictionary
14. Involuntariness: TheFreeDictionary.com

Business (2 matching dictionaries)

15. involuntariness: Merriam-Webster Legal Dictionary
16. involuntariness: Legal dictionary

Computing (1 matching dictionary)

17. involuntariness: Encyclopedia

Medicine (3 matching dictionaries)

18. involuntariness: Merriam-Webster Medical Dictionary
19. online medical dictionary (No longer online)
20. involuntariness: Medical dictionary

(Note: See involuntary as well.)

Definitions from Wiktionary (involuntariness) ▸ noun:  The state of being involuntary; unwillingness; automatism. Similar: voluntariness, voluntarity, unwillingness, unwillfulness, uncommandedness, volitionality, unwittingness, unwilfulness, undeliberateness, uninvolvedness, more... ▸ Words similar to involuntariness ▸ Usage examples for involuntariness ▸ Idioms related to involuntariness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing involuntariness ▸ Words that often appear near involuntariness ▸ Rhymes of involuntariness ▸ Invented words related to involuntariness