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Definitions

efficient

[ih-fish-uhnt] / ɪˈfɪʃ ənt /
ADJECTIVE
capable, effective
Synonyms
STRONGEST
able active adept adequate capable competent decisive dynamic economical effective energetic potent powerful productive profitable skilled skillful tough useful valuable
WEAK
accomplished adapted apt businesslike clever conducive deft economic effectual efficacious equal to experienced expert familiar with fitted good at good for handy masterly organized practiced proficient qualified ready saving shrewd systematic talented virtuous well-organized
Antonyms
STRONGEST
delicate fragile idle impotent inactive inadequate incapable incompetent ineffective inept lazy sluggish unable unskilled unskillful useless weak worthless
WEAK
helpless inefficient powerless

Usage

What are other ways to say efficient? The adjective efficient, when applied to a person or a thing, implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager. 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. 

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.

For the buyers, it’s way cheaper, more efficient, and less burdensome than the official Meta/TikTok/YouTube ad-and-influencer apparatus.

From Slate • May 6, 2026

This new framework could provide a more stable and efficient way to uncover hidden parameters across a wide variety of systems.

From Science Daily • May 6, 2026

The military sees an opportunity to make its operations more efficient by clearing the way for older hardware to interact with newer software, including AI models.

From The Wall Street Journal • May 5, 2026

The ultimate goal is a compiler that takes code written for conventional computers and automatically transforms it into an efficient quantum algorithm.

From Barron's • May 5, 2026

The goal of the innovation, in short, was to make the financial markets more efficient.

From "The Big Short" by Michael Lewis

Vocabulary lists containing efficient

List 1

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Labor Day Lexicon: Words That Put You To Work

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Essential English Vocabulary, List 1

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