effectiveness
noun/ɪˈfektɪvnəs/
/ɪˈfektɪvnəs/
(also less frequent effectivity
[uncountable]/ɪˌfekˈtɪvəti/
/ɪˌfekˈtɪvəti/
)- the fact of producing the result that is wanted or intended; the fact of producing a successful result
- to check the effectiveness of the security system
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