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View synonyms for effectiveness

effectiveness

[ ih-fek-tiv-nis, ee-fek‐ ]

noun

  1. the quality of producing an intended or desired result:

    For maximum effectiveness of your weight loss plan, you need to combine exercise with a healthy diet.

  2. the quality of producing a deep or vivid impression:

    We were struck by the evident appeal and effectiveness of these short, dramatic, upbeat video stories.

  3. a measure of the success of a vaccine or other pharmaceutical when used in the real world, as opposed to the controlled environment of a clinical trial. Compare efficacy ( def 2 ).

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Other Words From

  • sub·ef·fec·tive·ness noun
  • su·per·ef·fec·tive·ness noun
  • un·ef·fec·tive·ness noun

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Word History and Origins

Origin of effectiveness1

First recorded in 1600–10; effective ( def ) + -ness ( def )

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