Pronunciation: (i-fish'unt), [key]
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.

efficiency expertEffie
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