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We found 36 dictionaries with English definitions that include the word flatten:
Click on the first link on a line below to go directly to a page where "flatten" is defined.

General (29 matching dictionaries)

1. flatten: Merriam-Webster.com [home, info]
2. flatten: Oxford Learner's Dictionaries [home, info]
3. flatten: American Heritage Dictionary of the English Language [home, info]
4. flatten: Collins English Dictionary [home, info]
5. flatten: Vocabulary.com [home, info]
6. flatten: Macmillan Dictionary [home, info]
7. Flatten, flatten: Wordnik [home, info]
8. flatten: Cambridge Advanced Learner's Dictionary [home, info]
9. flatten: Wiktionary [home, info]
10. flatten: Webster's New World College Dictionary, 4th Ed. [home, info]
11. flatten: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. flatten: Infoplease Dictionary [home, info]
13. Flatten, flatten: Dictionary.com [home, info]
14. flatten: UltraLingua English Dictionary [home, info]
15. flatten: Cambridge Dictionary of American English [home, info]
16. Flatten: Wikipedia, the Free Encyclopedia [home, info]
17. flatten: Cambridge International Dictionary of Phrasal Verbs [home, info]
18. Flatten: Online Plain Text English Dictionary [home, info]
19. flatten: Webster's Revised Unabridged, 1913 Edition [home, info]
20. flatten: Rhymezone [home, info]
21. flatten: AllWords.com Multi-Lingual Dictionary [home, info]
22. flatten: Webster's 1828 Dictionary [home, info]
23. flatten: Free Dictionary [home, info]
24. flatten: Mnemonic Dictionary [home, info]
25. flatten: WordNet 1.7 Vocabulary Helper [home, info]
26. flatten: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. flatten: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

28. flatten: Epicurus.com Spanish Glossary [home, info]

Business (1 matching dictionary)

29. flatten: Legal dictionary [home, info]

Computing (2 matching dictionaries)

30. flatten: Free On-line Dictionary of Computing [home, info]
31. flatten: Encyclopedia [home, info]

Medicine (1 matching dictionary)

32. flatten: online medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

33. flatten: Idioms [home, info]

Religion (1 matching dictionary)

34. flatten: Scientology® and Dianetics® [home, info]

(Note: See flattens for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (flatten) ▸ verb:  lower the pitch of (musical notes) ▸ verb:  become flat or flatter ("The landscape flattened") ▸ verb:  make flat or flatter ("Flatten a road") ▸ name:  A surname (very rare: popularity rank in the U.S.: #43805) ▸ Also see flattens ▸ Words similar to flatten ▸ Usage examples for flatten ▸ Idioms related to flatten (New!) ▸ Words that often appear near flatten ▸ Rhymes of flatten ▸ Invented words related to flatten