EFFECTIVE Definition & Meaning - Merriam-Webster
Effective typically describes things—such as policies, treatments, arguments, and techniques—that do what they are intended to do. People can also be described as effective when they accomplish what …
EFFECTIVE | definition in the Cambridge English Dictionary
EFFECTIVE meaning: 1. successful or achieving the results that you want: 2. (used about a treatment or drug) working…. Learn more.
effective - Wiktionary, the free dictionary
Apr 3, 2026 · Adjective effective (comparative more effective, superlative most effective) Having the power to produce a required effect or effects.
effective - WordReference.com Dictionary of English
Effective, effectual, efficacious, efficient refer to that which is able to produce a (desired) effect.
EFFECTIVE definition and meaning | Collins English Dictionary
When something such as a law or an agreement becomes effective, it begins officially to apply or be valid. The new rules will become effective in the next few days.
Effective - definition of effective by The Free Dictionary
Effective and efficient are often confused, but they have slightly different meanings. If you are effective, you do a job properly; if you are efficient, you do it quickly and easily.
effective | meaning of effective in Longman Dictionary of ...
From Longman Business Dictionary ef‧fec‧tive /ɪˈfektɪv/ adjective 1 working well and producing the result or effect that was wanted or intended The company mounted a very effective publicity campaign.