We found 22 dictionaries that define the word using:

General (15 matching dictionaries)

1. using: Merriam-Webster
2. using: Collins English Dictionary
3. using: Vocabulary.com
4. Using, using: Wordnik
5. using: Cambridge Advanced Learner's Dictionary
6. using: Wiktionary
7. using: Dictionary.com
8. using: Cambridge Essential American English Dictionary
9. Using: Online Plain Text English Dictionary
10. using: Rhymezone
11. Using: AllWords.com Multi-Lingual Dictionary
12. using: FreeDictionary.org
13. using: Mnemonic Dictionary
14. using: TheFreeDictionary.com
15. using: Wikimedia Commons US English Pronunciations

Business (2 matching dictionaries)

16. using: Merriam-Webster Legal Dictionary
17. using: Legal dictionary

Computing (1 matching dictionary)

18. using: Encyclopedia

Medicine (1 matching dictionary)

19. using: Medical dictionary

Miscellaneous (2 matching dictionaries)

20. USING: Acronym Finder
21. using: Idioms

Slang (1 matching dictionary)

22. using: Urban Dictionary

(Note: See use as well.)

Definitions from Wiktionary (using) ▸ noun:  use; utilization Similar: exploitation, victimisation, victimization, utilize, employ, utilise, use, combining, incorporate, applying, more... Opposite: abandoning, discarding, ignoring, neglecting, avoiding Types: using computer, using phone, using pen, using pencil, using hammer, using screwdriver, using saw, using knife, using stove, more... Phrases: using up, ill using, using name, using a sledgehammer to crack a nut, using loaf, more... Adjectives: print, wood, call, procedure, part, sort, tool ▸ Words similar to using ▸ Usage examples for using ▸ Idioms related to using ▸ Wikipedia articles (New!) ▸ Popular adjectives describing using ▸ Words that often appear near using ▸ Rhymes of using ▸ Invented words related to using