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We found 41 dictionaries with English definitions that include the word effective:
Click on the first link on a line below to go directly to a page where "effective" is defined.

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

Business dictionaries Business (5 matching dictionaries)
  1. Effective: MoneyGlossary.com [home, info]
  2. effective: Glossary of Legal Terms [home, info]
  3. Effective: Construction Term Glossary [home, info]
  4. effective: Legal dictionary [home, info]
  5. effective: BusinessDictionary.com [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. effective: Encyclopedia [home, info]

Medicine dictionaries Medicine (2 matching dictionaries)
  1. effective: online medical dictionary [home, info]
  2. effective: Medical dictionary [home, info]

Miscellaneous dictionaries Miscellaneous (2 matching dictionaries)
  1. EFFECTIVE: Navajo Code Talkers' Dictionary [home, info]
  2. effective: Sound-Alike Words [home, info]

Science dictionaries Science (1 matching dictionary)
  1. effective: PlanetMath Encyclopedia [home, info]

Tech dictionaries Tech (2 matching dictionaries)
  1. Effective: AUTOMOTIVE TERMS [home, info]
  2. Effective: Heavy construction glossary [home, info]

(Note: See effectivity for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (effective)

adjective:  equipped and ready for service ("The fort was held by about 100 effective soldiers")
adjective:  existing in fact; not theoretical; real ("A decline in the effective demand")
adjective:  able to accomplish a purpose; functioning effectively ("People who will do nothing unless they get something out of it for themselves are often highly effective persons...-G.B.Shaw")
adjective:  exerting force or influence ("The law is effective immediately")
adjective:  producing or capable of producing an intended result or having a striking effect ("An air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation-LewisMumford")
adjective:  works well as a means or remedy ("An effective reprimand")

▸ Also see effectivity

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Phrases that include effective:   cost effective, effective date, effective dose, effective tax rate, effective interest rate, more...

Words similar to effective:   effectiveness, effectivity, effectual, efficacious, efficient, good, cogent, in effect, in force, potent, telling, more...

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