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effective - definition and synonyms


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adjective effective pronunciation in British English /ɪˈfektɪv/

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  1. 1
    someone or something that is effective works well and produces the result that was intended
    You need more effective communication within the organization.
    Humour is often far more effective than shouting.
    The troops should be deployed where they will be most effective.
    effective against: The new vaccine is highly effective against all strains of the disease.
    effective way/method/means: This is a very effective way of controlling pests and weeds.
    1. a.
      attractive or impressive, and producing a definite effect
      The decorations are easy to make, yet very effective.
  2. 2
    formal when a law or agreement becomes effective, it officially begins to be used
    effective from: Government ministers reached a 30-month agreement, effective from 1 July.

derived word


 effective pronunciation in British English noun [uncountable]


a meal served in the evening which consists of foods traditionally eaten at breakfast

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a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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