[ ih-fek-choo-uh l ]
/ ɪˈfɛk tʃu əl /


producing or capable of producing an intended effect; adequate.
valid or binding, as an agreement or document.

Nearby words

  1. effective temperature,
  2. effectively,
  3. effectiveness,
  4. effector,
  5. effects,
  6. effectually,
  7. effectuate,
  8. effeminacy,
  9. effeminate,
  10. effemination

Origin of effectual

1350–1400; Middle English effectuel (< AF), late Middle English effectual < Medieval Latin effectuālis, equivalent to Latin effectu-, stem of effectus effect + -ālis -al1

Related formsef·fec·tu·al·ly, adverbef·fec·tu·al·ness, ef·fec·tu·al·i·ty, nounpre·ef·fec·tu·al, adjectivepre·ef·fec·tu·al·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for effectual

British Dictionary definitions for effectual


/ (ɪˈfɛktjʊəl) /


capable of or successful in producing an intended result; effective
(of documents, agreements, etc) having legal force
Derived Formseffectuality or effectualness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for effectual



late 14c., Old French effectuel, from Late Latin effectualis, from Latin effectus "accomplishment, performance" (see effect (n.)). Used properly of actions (not agents) and with a sense "having the effect aimed at." Related: Effectually; effectuality.

Online Etymology Dictionary, © 2010 Douglas Harper