We found 18 dictionaries that define the word a4:

General (10 matching dictionaries)

1. A4: Oxford Learner's Dictionaries
2. A4: Collins English Dictionary
3. A4: Cambridge Advanced Learner's Dictionary
4. A4: Wiktionary
5. A4: Dictionary.com
6. A4 (Italy), A4 (Switzerland), A4 (classification), A4 (paper), A4 (paper size), A4 (rocket), A4: Wikipedia, the Free Encyclopedia
7. A4: Stammtisch Beau Fleuve Acronyms
8. A4: TheFreeDictionary.com
9. a4: Longman Dictionary of Contemporary English

Computing (2 matching dictionaries)

10. Webopedia (No longer online)
11. A4 (disambiguation), A4: Encyclopedia

Medicine (1 matching dictionary)

12. A4 (disambiguation), A4: Medical dictionary

Miscellaneous (3 matching dictionaries)

13. A4: Custom License Plate Terms
14. A4: Acronym Finder
15. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

16. A4: Urban Dictionary

Tech (1 matching dictionary)

17. Locksmith Dictionary (No longer online)

Similar: 1A, A, a1, A2, A3, A5, A6, androstenedione, B, b3, more... Types: paper, cardstock, construction paper, copy paper, bond paper, vellum, more... Phrases: ephrin a4, leukotriene a4, Audi A4, LNER Class A4 4468 Mallard, LNER Class A4, more... ▸ Words similar to a4 ▸ Usage examples for a4 ▸ Idioms related to a4 ▸ Wikipedia articles (New!) ▸ Words that often appear near a4 ▸ Rhymes of a4 ▸ Invented words related to a4