The property of being effective, of achieving results.
‘The effectiveness of the drug was well established.’;
The quality of being sufficient, adequate or able to meet the needs.
‘His zeal is, of course, unquestionable; his adequacy, however, I doubt.’;
The capacity or potential for achieving results.
The state or quality of being adequate, proportionate, or sufficient; a sufficiency for a particular purpose; as, the adequacy of supply to the expenditure.
The degree to which something achieves results.
‘He questioned the effectiveness of the treatment.’;
the quality of being able to meet a need satisfactorily:
‘he questioned the adequacy of the usual sentimental interpretation of the Golden Rule’;
The quality of being effective.
the quality of being sufficient for the end in view;
‘he questioned the sufficiency of human intelligence’;
power to be effective; the quality of being able to bring about an effect
capacity to produce strong physiological or chemical effects;
‘the toxin's potency’; ‘the strength of the drinks’;
Effectiveness is the capability of producing a desired result or the ability to produce desired output. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression.