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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.

In the long term, the stock market is efficient.

From Barron's

Taken together, the findings suggest that making mitochondria more energy efficient may help delay or reduce common problems linked to aging.

From Science Daily

Buffett is also living proof that “one could prosper by uncovering market inefficiencies,” pushing back in the 1960s and 1970s on the idea that in efficient markets, stock prices quickly absorb new information, said Klarman.

From MarketWatch

The company, Noto added, is “combining our regulatory strength as a national bank with transparent, fully reserved on-chain technology to provide a safer and more efficient way for partners to move funds.”

From Barron's

“The single-premium immediate annuity is one of the most popular forms of annuity and the most efficient,” said Josh Weinstein, vice president of lifetime income solutions at Fidelity.

From MarketWatch

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