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We found 17 dictionaries with English definitions that include the word 13:
Click on the first link on a line below to go directly to a page where "13" is defined.

General (10 matching dictionaries)

1. 13: Vocabulary.com [home, info]
2. 13: Wordnik [home, info]
3. 13: Dictionary.com [home, info]
4. 13: Cambridge Dictionary of American English [home, info]
5. 13: Rhymezone [home, info]
6. 13: Stammtisch Beau Fleuve Acronyms [home, info]
7. 13: Free Dictionary [home, info]
8. 13: Mnemonic Dictionary [home, info]
9. 13: WordNet 1.7 Vocabulary Helper [home, info]
10. 13: LookWAYup Translating Dictionary/Thesaurus [home, info]

Business (1 matching dictionary)

11. 13: Bernstein's Dictionary of Bankruptcy Terminology [home, info]

Computing (1 matching dictionary)

12. 13, 13 (number): Encyclopedia [home, info]

Miscellaneous (1 matching dictionary)

13. 13: Acronym Finder [home, info]

Religion (1 matching dictionary)

14. 13: Postmodern Bible Dictionary [home, info]

Science (1 matching dictionary)

15. 13: Eric Weisstein's World of Mathematics [home, info]

Sports (1 matching dictionary)

16. 13: Card Games [home, info]

Tech (1 matching dictionary)

17. 13: Basics of Space Flight Glossary [home, info]

(Note: See thirteenth for more definitions.)

Quick definitions from WordNet (13) ▸ noun:  the cardinal number that is the sum of twelve and one ▸ adjective:  being one more than twelve ▸ Also see thirteenth ▸ Words similar to 13 ▸ Usage examples for 13 ▸ Idioms related to 13 (New!) ▸ Popular adjectives describing 13 ▸ Popular nouns described by 13 ▸ Words that often appear near 13 ▸ Rhymes of 13 ▸ Invented words related to 13