We found 25 dictionaries that define the word approx:

General (16 matching dictionaries)

1. approx: Merriam-Webster
2. approx: Oxford Learner's Dictionaries
3. approx, approx: Collins English Dictionary
4. Approx, approx: Wordnik
5. approx: Cambridge Advanced Learner's Dictionary
6. approx: Wiktionary
7. approx: Webster's New World College Dictionary, 4th Ed.
8. approx: The Wordsmyth English Dictionary-Thesaurus
9. approx: Infoplease Dictionary
10. approx, approx: Dictionary.com
11. Approx: Wikipedia, the Free Encyclopedia
12. approx, approx: TheFreeDictionary.com
13. approx: Longman Dictionary of Contemporary English
14. approx: Merriam-Webster

Business (1 matching dictionary)

15. Approx: Legal dictionary

Computing (1 matching dictionary)

16. approx: Encyclopedia

Medicine (2 matching dictionaries)

17. approx: Merriam-Webster Medical Dictionary
18. Approx: Medical dictionary

Miscellaneous (3 matching dictionaries)

19. approx, approx, approx: Terminology and Descriptions of Geneaological Words
20. APPROX: Acronym Finder
21. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

22. approx: Urban Dictionary

Tech (1 matching dictionary)

23. Explosives (No longer online)

Definitions from Wiktionary ( ) ▸ adjective:  Alternative spelling of approx. ▸ adverb:  Alternative spelling of approx. Similar: appx, approximately, approx., appr, roughly, approximatively, 1-1.5, 1.5-2, roughtly, 2.5-3, more... Opposite: exact, precise, accurate, definite, specific Types: estimate, ballpark, guesstimate, rough, more... Adjectives: total, only, fiscal, height, average, high, length, normal, scale, current, detail ▸ Words similar to approx ▸ Usage examples for approx ▸ Idioms related to approx ▸ Wikipedia articles (New!) ▸ Popular nouns described by approx ▸ Words that often appear near approx ▸ Rhymes of approx ▸ Invented words related to approx