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Definitions

effective

[ih-fek-tiv, ee-fek-] / ɪˈfɛk tɪv, iˈfɛk- /

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successful, persuasive adj.
in use at the time adj.

ADJECTIVE

successful, persuasive

Synonyms

STRONGEST

active adequate compelling competent direct efficient forceful impressive potent powerful practical successful useful valid

STRONG

effectual efficacious

WEAK

able big-wheel capable cogent convincing emphatic energetic forcible having lead in pencil live moving on the ball operative persuasive playing hardball powerhouse producing resultant serviceable serving sound striking telling trenchant virtuous wicked yielding

Antonyms

STRONGEST

helpless impotent inadequate incapable incompetent ineffective inefficient insufficient unable useless weak worthless

STRONG

unproductive unsuccessful

WEAK

fruitless inoperative

ADJECTIVE

in use at the time

Synonyms

STRONGEST

active direct dynamic

WEAK

actual current in effect in execution in force in operation operative real

Antonyms

STRONGEST

inactive

WEAK

fruitless impotent incapable ineffective inoperative unproductive useless weak

Usage

What are other ways to say effective? The adjective effective is applied to a person or a thing that has the power to, or which actually does, produce an effect: an effective boss, remedy, speech. Effectual is used especially of that which produces the effect desired or intended, or a decisive result: An effectual bombardment silenced the enemy. Efficacious suggests the capability of achieving a certain end: an efficacious plan, medicine. Efficient (applied also to persons) implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

effective

EU regulation has been effective in reducing emissions from air pollutants, except for ozone, the report said.

From Barron's ● Sep. 30, 2026

"Their efforts have been very effective so far."

From BBC ● Sep. 29, 2026

“But we’re really dedicating ourselves to getting more effective on it.”

From The Wall Street Journal ● Sep. 29, 2026

Now, Rayner is taking aim at the web of management companies that operate between leaseholders and their effective landlords.

From BBC ● Sep. 29, 2026

This method was particularly effective in the case of the dragon of Lambton Hall.

From "Jeremy Thatcher, Dragon Hatcher" by Bruce Coville

effective

Usage

Example Sentences

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Vocabulary lists containing effective

"Diary of a Wimpy Kid" by Jeff Kinney

Hatchet

STAAR English I: The Language of the Test 1

effective

Usage

Example Sentences

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Related Words

Vocabulary lists containing effective

"Diary of a Wimpy Kid" by Jeff Kinney

Hatchet

STAAR English I: The Language of the Test 1