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We found 27 dictionaries with English definitions that include the word unacceptable:
Click on the first link on a line below to go directly to a page where "unacceptable" is defined.

General (25 matching dictionaries)

1. unacceptable: Merriam-Webster.com [home, info]
2. unacceptable: Oxford Learner's Dictionaries [home, info]
3. unacceptable: American Heritage Dictionary of the English Language [home, info]
4. unacceptable: Collins English Dictionary [home, info]
5. unacceptable: Vocabulary.com [home, info]
6. unacceptable: Macmillan Dictionary [home, info]
7. Unacceptable, unacceptable: Wordnik [home, info]
8. unacceptable: Cambridge Advanced Learner's Dictionary [home, info]
9. unacceptable: Wiktionary [home, info]
10. unacceptable: Dictionary.com [home, info]
11. unacceptable: Online Etymology Dictionary [home, info]
12. unacceptable: UltraLingua English Dictionary [home, info]
13. unacceptable: Cambridge Dictionary of American English [home, info]
14. Unacceptable: Online Plain Text English Dictionary [home, info]
15. unacceptable: Webster's Revised Unabridged, 1913 Edition [home, info]
16. unacceptable: Rhymezone [home, info]
17. Unacceptable: AllWords.com Multi-Lingual Dictionary [home, info]
18. unacceptable: Webster's 1828 Dictionary [home, info]
19. unacceptable: Free Dictionary [home, info]
20. unacceptable: Mnemonic Dictionary [home, info]
21. unacceptable: WordNet 1.7 Vocabulary Helper [home, info]
22. unacceptable: LookWAYup Translating Dictionary/Thesaurus [home, info]
23. unacceptable: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

24. unacceptable: Legal dictionary [home, info]

Slang (1 matching dictionary)

25. unacceptable: Urban Dictionary [home, info]

(Note: See unacceptably for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (unacceptable) ▸ adjective:  not adequate to give satisfaction ("The coach told his players that defeat was unacceptable") ▸ adjective:  not conforming to standard usage ("The following use of `access' was judged unacceptable by a panel of linguists") ▸ adjective:  not acceptable; not welcome ("A word unacceptable in polite society") ▸ adjective:  used of persons or their behavior ▸ Also see unacceptably ▸ Word origin ▸ Words similar to unacceptable ▸ Usage examples for unacceptable ▸ Idioms related to unacceptable (New!) ▸ Popular nouns described by unacceptable ▸ Words that often appear near unacceptable ▸ Rhymes of unacceptable ▸ Invented words related to unacceptable