Definition of effectual in English:



  • (typically of something inanimate or abstract) successful in producing a desired or intended result; effective.

    ‘tobacco smoke is the most effectual protection against the mosquito’
    • ‘The effectual fervent prayer of a righteous man availeth much.’
    • ‘If this can be done, the rampart which the constitution has built up to secure the hearthstone from rude intrusion, is an effectual defense no longer.’
    • ‘It was a wonder of his grace, that the call was made so effectual.’
    • ‘It is true, the Lord can, and I hope He often does, make that preaching effectual to the conversion of sinners, wherein little is said expressly to them, only the truths of the gospel are declared in their hearing’
    • ‘However, the court may order such particulars as may be necessary to prevent surprise and unnecessary expense and to ensure a fair and effectual trial.’
    effective, successful, efficacious, productive, constructive, fruitful, potent, powerful
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Late Middle English: from medieval Latin effectualis, from Latin effectus (see effect).