We found 21 dictionaries that define the word monomaniac:

General (16 matching dictionaries)

1. monomaniac: Merriam-Webster
2. monomaniac: Oxford Learner's Dictionaries
3. monomaniac: Collins English Dictionary
4. monomaniac: Vocabulary.com
5. monomaniac: Wordnik
6. monomaniac: Cambridge Advanced Learner's Dictionary
7. monomaniac: Wiktionary
8. monomaniac: Dictionary.com
9. Monomaniac: Wikipedia, the Free Encyclopedia
10. Monomaniac: Online Plain Text English Dictionary
11. monomaniac: Webster's Revised Unabridged, 1913 Edition
12. monomaniac: Rhymezone
13. Monomaniac: AllWords.com Multi-Lingual Dictionary
14. monomaniac: FreeDictionary.org
15. monomaniac: Mnemonic Dictionary
16. monomaniac: TheFreeDictionary.com

Business (1 matching dictionary)

17. monomaniac: Legal dictionary

Computing (1 matching dictionary)

18. monomaniac: Encyclopedia

Medicine (3 matching dictionaries)

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

(Note: See monomania as well.)

Definitions from Wiktionary (monomaniac) ▸ noun:  A person who is obsessed with a single thing, to the exclusion of other concerns. ▸ adjective:  Focused on one thing above all others. Similar: monomane, maniac, egomaniac, obsessor, obsessionist, obsessive, oniomaniac, automaniac, obsessionism, theomaniac, more... Opposite: polymath, versatile, well-rounded Types: workaholic, shopaholic, clefreak, germaphobe, control freak, perfectionist, foodie, coffee addict, more... Adjectives: homicidal, religious, dangerous, harmless, instructive, old, poor, mere, veritable, fanatical, perfect ▸ Words similar to monomaniac ▸ Usage examples for monomaniac ▸ Idioms related to monomaniac ▸ Wikipedia articles (New!) ▸ Popular adjectives describing monomaniac ▸ Popular nouns described by monomaniac ▸ Words that often appear near monomaniac ▸ Rhymes of monomaniac ▸ Invented words related to monomaniac