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We found 37 dictionaries with English definitions that include the word powerful:
Click on the first link on a line below to go directly to a page where "powerful" is defined.

General (30 matching dictionaries)

1. powerful: Merriam-Webster.com [home, info]
2. powerful: Oxford Learner's Dictionaries [home, info]
3. powerful: American Heritage Dictionary of the English Language [home, info]
4. powerful: Collins English Dictionary [home, info]
5. powerful: Vocabulary.com [home, info]
6. powerful: Macmillan Dictionary [home, info]
7. Powerful, powerful: Wordnik [home, info]
8. powerful: Cambridge Advanced Learner's Dictionary [home, info]
9. powerful: Wiktionary [home, info]
10. powerful: Webster's New World College Dictionary, 4th Ed. [home, info]
11. powerful: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. powerful: Infoplease Dictionary [home, info]
13. Powerful, powerful: Dictionary.com [home, info]
14. powerful: UltraLingua English Dictionary [home, info]
15. powerful: Cambridge Dictionary of American English [home, info]
16. Powerful (Young Noble album), Powerful (song), Powerful: Wikipedia, the Free Encyclopedia [home, info]
17. Powerful: Online Plain Text English Dictionary [home, info]
18. powerful: Webster's Revised Unabridged, 1913 Edition [home, info]
19. powerful: Rhymezone [home, info]
20. powerful: AllWords.com Multi-Lingual Dictionary [home, info]
21. powerful: Webster's 1828 Dictionary [home, info]
22. POWERFUL: Dictionary of Americanisms (1848) [home, info]
23. powerful: Free Dictionary [home, info]
24. powerful: Mnemonic Dictionary [home, info]
25. powerful: WordNet 1.7 Vocabulary Helper [home, info]
26. powerful: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. powerful: Dictionary/thesaurus [home, info]
28. powerful: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

29. Powerful: Epicurus.com Wine Glossary [home, info]

Business (1 matching dictionary)

30. powerful: Legal dictionary [home, info]

Computing (2 matching dictionaries)

31. PowerFuL: Free On-line Dictionary of Computing [home, info]
32. powerful: Encyclopedia [home, info]

Medicine (1 matching dictionary)

33. PowerFuL, powerful: online medical dictionary [home, info]

Slang (2 matching dictionaries)

34. Powerful: Dublin Slang and Phrasebook [home, info]
35. powerful: Urban Dictionary [home, info]

(Note: See powerfully for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (powerful) ▸ adjective:  having great power or force or potency or effect ("The most powerful government in western Europe") ▸ adjective:  displaying superhuman strength or power ▸ adjective:  strong enough to knock down or overwhelm ▸ adjective:  having the power to influence or convince ▸ adjective:  (of a person) possessing physical strength and weight; rugged and powerful ("Powerful arms") ▸ adverb:  (Southern regional intensive) very ("It is powerful humid") ▸ Also see powerfully ▸ Words similar to powerful ▸ Usage examples for powerful ▸ Idioms related to powerful (New!) ▸ Popular nouns described by powerful ▸ Words that often appear near powerful ▸ Rhymes of powerful ▸ Invented words related to powerful