effectiveness

Meanings

1. 1
   noun

   The property of being effective, of achieving results.

   The effectiveness of the drug was well established.

2. 2
   noun

   The capacity or potential for achieving results.

   The problem with these precedents is that the Security Council did not authorize intervention in Syria, and an intervention there will thus harm, not help, the Council’s credibility and effectiveness.

3. 3
   noun

   The degree to which something achieves results.

   He questioned the effectiveness of the treatment.

4. 4
   noun

   capacity to produce strong physiological or chemical effects

5. 5
   noun

   power to be effective

Etymology

From effective + -ness.