Definition of efficaciousness in English:

efficaciousness

noun

formal

See efficacious

  • ‘Where he differs is in his claims about power and its alleged efficaciousness in bringing about ‘knowledge’.’
  • ‘Obviously some weapon systems are more effective than others, but the efficaciousness of air defence measures depend basically on the gap between the technological/industrial investment and output of the competing sides.’
  • ‘Stating that the first big downpour is usually a test to check the efficaciousness of the drainage system, he said it had helped the department to gauge the problem areas in the city.’
  • ‘Clinicians simply avoided them because accepted theories of disease mechanism and drug action offered no explanation for their efficaciousness.’
  • ‘Are you questioning whether these acts have any efficaciousness?’

Pronunciation

efficaciousness

/ɛfɪˈkeɪʃəsnəs/