We found 9 dictionaries that define the word a/o:

General (5 matching dictionaries)

1. a/o: American Heritage Dictionary of the English Language
2. A/O: Collins English Dictionary
3. A/o: Webster's New World College Dictionary, 4th Ed.
4. a/o: Dictionary.com
5. a/o: TheFreeDictionary.com

Business (1 matching dictionary)

6. Glossary of Trade and Shipping Terms (No longer online)

Miscellaneous (2 matching dictionaries)

7. A/O: Acronym Finder
8. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

9. a/o: Urban Dictionary

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