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We found 28 dictionaries with English definitions that include the word optimistic:
Click on the first link on a line below to go directly to a page where "optimistic" is defined.

General (24 matching dictionaries)

1. optimistic: Merriam-Webster.com [home, info]
2. optimistic: Oxford Dictionaries [home, info]
3. optimistic: Collins English Dictionary [home, info]
4. optimistic: Vocabulary.com [home, info]
5. optimistic: Macmillan Dictionary [home, info]
6. Optimistic, optimistic: Wordnik [home, info]
7. optimistic: Cambridge Advanced Learner's Dictionary [home, info]
8. optimistic: Wiktionary [home, info]
9. optimistic: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. optimistic: Infoplease Dictionary [home, info]
11. Optimistic, optimistic: Dictionary.com [home, info]
12. optimistic: UltraLingua English Dictionary [home, info]
13. optimistic: Cambridge Dictionary of American English [home, info]
14. Optimistic (Radiohead song), Optimistic (Sounds of Blackness song), Optimistic: Wikipedia, the Free Encyclopedia [home, info]
15. Optimistic: Online Plain Text English Dictionary [home, info]
16. optimistic: Rhymezone [home, info]
17. Optimistic: AllWords.com Multi-Lingual Dictionary [home, info]
18. optimistic: Free Dictionary [home, info]
19. optimistic: Mnemonic Dictionary [home, info]
20. optimistic: WordNet 1.7 Vocabulary Helper [home, info]
21. optimistic: LookWAYup Translating Dictionary/Thesaurus [home, info]
22. optimistic: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

23. optimistic: Legal dictionary [home, info]

Computing (1 matching dictionary)

24. optimistic: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

25. optimistic: online medical dictionary [home, info]
26. optimistic: Medical dictionary [home, info]

(Note: See optimistically for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (optimistic) ▸ adjective:  expecting the best in this best of all possible worlds ("In an optimistic mood") ▸ adjective:  expecting the best ▸ Also see optimistically ▸ Words similar to optimistic ▸ Usage examples for optimistic ▸ Popular nouns described by optimistic ▸ Words that often appear near optimistic ▸ Rhymes of optimistic ▸ Invented words related to optimistic