We found 13 dictionaries that define the word O'Brien:

General (10 matching dictionaries)

1. O'Brien, O'Brien: Collins English Dictionary
2. O'Brien: Vocabulary.com
3. O'Brien, OBrien, OBrien, O'brien, Obrien, o'brien, obrien: Wordnik
4. O'Brien: Wiktionary
5. o'brien, obrien: Dictionary.com
6. O'Brien, O'Brien (Nineteen Eighty-Four), O'Brien (Star Trek), O'Brien (TV series), O'Brien (book character), O'Brien (disambiguation), O'Brien (surname): Wikipedia, the Free Encyclopedia
7. O'brien, Obrien: Rhymezone
8. obrien: FreeDictionary.org
9. o'brien: Mnemonic Dictionary
10. O'Brien: TheFreeDictionary.com

Computing (1 matching dictionary)

11. O'Brien: Encyclopedia

Slang (1 matching dictionary)

12. O'Brien: Urban Dictionary

Tech (1 matching dictionary)

13. O'Brien: Glossary of Insulator Terms

Definitions from WordNet (O'brien) ▸ noun:  Irish writer (born in 1932) Phrases: edna obrien, obrien edna, obrien flann, more... ▸ Words similar to O'Brien ▸ Usage examples for O'Brien ▸ Idioms related to O'Brien ▸ Wikipedia articles (New!) ▸ Popular adjectives describing O'Brien ▸ Words that often appear near O'Brien ▸ Rhymes of O'Brien ▸ Invented words related to O'Brien