[ 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.

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 forms

ef·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 Forms

effectuality 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