'Effectual' definitions:

Definition of 'effectual'

From: WordNet
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; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law" [syn: effective, effectual, efficacious] [ant: ineffective, ineffectual, uneffective]
adjective
Having legal efficacy or force; "a sound title to the property" [syn: legal, sound, effectual]

Definition of 'Effectual'

From: GCIDE
  • Effectual \Ef*fec"tu*al\ (?; 135), a. [See Effect, n.] Producing, or having adequate power or force to produce, an intended effect; adequate; efficient; operative; decisive. --Shak. [1913 Webster]
  • Effectual steps for the suppression of the rebellion. --Macaulay. [1913 Webster]
  • Effectual calling (Theol.), a doctrine concerning the work of the Holy Spirit in producing conviction of sin and acceptance of salvation by Christ, -- one of the five points of Calvinism. See Calvinism.
  • Syn: Effectual, Efficacious, Effective.
  • Usage: An efficacious remedy is had recourse to, and proves effective if it does decided good, effectual if it does all the good desired. --C. J. Smith. [1913 Webster]