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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.

Photonic computing relies on light rather than electricity to perform calculations, offering the potential for faster and more efficient systems.

From Science Daily

It is efficient, yes—but efficiency isn’t always what the recipient wants to maximize.

From The Wall Street Journal

Large software companies are seeking out the many smaller players to help build out their artificial intelligence offerings, create the ability to cross-sell more products to customers and create more efficient cost structures.

From Barron's

The approach is also highly efficient, since it removes almost all plankton from the water.

From Science Daily

During this stage, the brain’s wiring becomes more efficient, and there is strong, rapid communication between regions as well as within them.

From The Wall Street Journal

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