Dictionary  ef•fi•cientPronunciation: (i-fish'unt), [key] —adj. 1. performing or functioning in the best possible manner with the least waste of time and effort; having and using requisite knowledge, skill, and industry; competent; capable: a reliable, efficient secretary. 2. satisfactory and economical to use: Our new air conditioner is more efficient than our old one. 3. producing an effect, as a cause; causative. 4. utilizing a particular commodity or product with maximum efficiency (usually used in combination): a fuel-efficient engine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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