We found 26 dictionaries that define the word coincidental:

General (23 matching dictionaries)

1. coincidental: Merriam-Webster
2. coincidental: Oxford Learner's Dictionaries
3. coincidental: American Heritage Dictionary of the English Language
4. coincidental: Collins English Dictionary
5. coincidental: Vocabulary.com
6. Coincidental, coincidental: Wordnik
7. coincidental: Cambridge Advanced Learner's Dictionary
8. coincidental: Wiktionary
9. coincidental: Webster's New World College Dictionary, 4th Ed.
10. coincidental: The Wordsmyth English Dictionary-Thesaurus
11. coincidental: Infoplease Dictionary
12. Coincidental, coincidental: Dictionary.com
13. coincidental: Cambridge Essential American English Dictionary
14. Coincidental: Online Plain Text English Dictionary
15. coincidental: Webster's Revised Unabridged, 1913 Edition
16. coincidental: Rhymezone
17. Coincidental: AllWords.com Multi-Lingual Dictionary
18. coincidental: FreeDictionary.org
19. coincidental: Mnemonic Dictionary
20. coincidental: TheFreeDictionary.com
21. coincidental: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

22. coincidental: Legal dictionary

Computing (1 matching dictionary)

23. coincidental: Encyclopedia

Sports (1 matching dictionary)

24. Hickok Sports Glossaries (No longer online)

(Note: See coincidentally as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Occurring as or resulting from coincidence. ▸ adjective:  Happening or existing at the same time. Similar: coinciding, concurrent, coincident, simultaneous, synchronic, synchronal, synchronous, at the same time, cooccurring, cohencidental, more... Opposite: noncoincidental Types: synchronicity, coincidence, chance, co-incidence, co-occurrence, co-observation, more... Phrases: coincidental evolution, opposite of coincidental, coincidental and interesting, not coincidental, coincidental occurence, more... ▸ Words similar to coincidental ▸ Usage examples for coincidental ▸ Idioms related to coincidental ▸ Wikipedia articles (New!) ▸ Popular nouns described by coincidental ▸ Words that often appear near coincidental ▸ Rhymes of coincidental ▸ Invented words related to coincidental