Efficient most often describes what is capable of producing desired results without wasting materials, time, or energy. While the word can be applied to both people and things, it is far …

EFFECTIVE definition: 1. successful or achieving the results that you want: 2. (used about a treatment or drug) working…. Learn more.

The adjective effective describes things that are adequate to accomplish a purpose, or that produce the intended or expected result. But effective isn’t quite the same as effectual, …

Effectiveness or effectivity[1] 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 …

Definition of effective adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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.

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.

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 …

Effective, effectual, efficacious, efficient refer to that which is able to produce a (desired) effect. Effective is applied to that which has the power to, or which actually does, produce an effect: …

Dec 14, 2025 · effectively (comparative more effectively, superlative most effectively) In an efficient or effective manner; with powerful effect. quotations