We found 15 dictionaries that define the word w/o:

General (8 matching dictionaries)

1. w/o: Merriam-Webster
2. w/o: Oxford Learner's Dictionaries
3. w/o: American Heritage Dictionary of the English Language
4. w/o: Collins English Dictionary
5. w/o: Webster's New World College Dictionary, 4th Ed.
6. w/o: The Wordsmyth English Dictionary-Thesaurus
7. w/o: Dictionary.com
8. w/o: TheFreeDictionary.com

Art (1 matching dictionary)

9. Glossary of Stamp Collecting Terms (No longer online)

Computing (2 matching dictionaries)

10. W/O: Netlingo
11. BABEL: Computer Oriented Abbreviations and Acronyms (No longer online)

Miscellaneous (3 matching dictionaries)

12. w/o, w/o, w/o: Terminology and Descriptions of Geneaological Words
13. W/O: Acronym Finder
14. AbbreviationZ (No longer online)

Tech (1 matching dictionary)

15. AUTOMOTIVE TERMS (No longer online)

Similar: buy up, fork over, pay dividends, buy out, carry forward, pay the piper, make over, top up, break even, save the day, more... Opposite: with, including, having ▸ Words similar to w/o ▸ Usage examples for w/o ▸ Idioms related to w/o ▸ Wikipedia articles (New!) ▸ Words that often appear near w/o ▸ Rhymes of w/o ▸ Invented words related to w/o