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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.

She says her workouts have become shorter and more efficient as a result.

From The Wall Street Journal

A 10-person startup called Cache Energy, working out of a 10,000-square-foot facility in Champaign, Ill., says it has figured out how to make such a cement battery durable, efficient and affordable.

From The Wall Street Journal

"The point about the Earl Marshal and the Lord Great Chamberlain is that they are both dignified and efficient," Lord Roberts said.

From BBC

Instead, what followed was a demonstration of Jevons’ Paradox: More-capable and efficient models greatly increased demand for AI services, justifying more investment.

From Barron's

It’s needed for economic efficiency, price discovery, efficient financial markets and good policy.

From The Wall Street Journal

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.