Meanings
-
1
noun
The quality of working well and producing good results.
The effectiveness of the drug was well established.
-
2
noun
How well something achieves its intended results.
He questioned the effectiveness of the treatment.
Thesaurus
Synonyms
1
noun
· the quality of working well...
effectuality
Word family
Forms
effectivenesses
Derived forms
bioeffectivenesscost-effectiveness
Etymology
From effective + -ness.