Definition of effectual in English:



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

    ‘tobacco smoke is the most effectual protection against the midge’
    • ‘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.’
    • ‘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.’
    • ‘It was a wonder of his grace, that the call was made so effectual.’
    • ‘The effectual fervent prayer of a righteous man availeth much.’
    • ‘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’
    effective, successful, efficacious, productive, constructive, fruitful, potent, powerful
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    1. 1.1Law (of a legal document) valid or binding.
      • ‘The Commissioner of Stamp Duties accepted, on the basis that these documents were effectual, that there was no duty assessable.’
      • ‘Clause 6 reads: ‘The lease is deemed to be, and to have always been, as valid and effectual as if all the land that is subject to the lease had not been that land described in the Schedule.’’
      • ‘I have already referred the Court to section 151, which deals with when instruments of lease become effectual, which is on registration.’
      valid, authentic, legally acceptable, proper, bona fide, genuine, official, signed and sealed
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Late Middle English: from medieval Latin effectualis, from Latin effectus (see effect).