Webster's 1913 Dictionary
EFFECTIVENESS
EFFECTIVENESS Ef *fect "ive *ness, n.
Defn: The quality of being effective.
New American Oxford Dictionary
effectiveness
ef fec tive ness |iˈfektivnis ɪˈfɛktɪvnɪs ɪˈfektɪv | ▶noun the degree to which something is successful in producing a desired result; success: the effectiveness of the treatment.
Oxford Dictionary
effectiveness
ef ¦fect ¦ive |ness |ɪˈfɛktɪvnɪs | ▶noun [ mass noun ] the degree to which something is successful in producing a desired result; success: the effectiveness of the treatment.
American Oxford Thesaurus
effectiveness
effectiveness noun we were impressed by the effectiveness of the nontoxic pesticide: success, productiveness, potency, power; benefit, advantage, value, virtue, usefulness; formal efficacy.
Oxford Thesaurus
effectiveness
effectiveness noun pupils' progress is a far better measure of a school's effectiveness: success, successfulness, efficacy, productiveness, fruitfulness, potency, power; benefit, advantage, value, virtue, use, usefulness; rare effectuality, constructiveness. ANTONYMS ineffectiveness.
Sanseido Wisdom Dictionary
effectiveness
ef f é c tive ness 名詞 U 有効性 .
The Wordsmith Dictionary