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WordReference Random House Unabridged Dictionary of American English © 2024ef•fi•cien•cy (i fish′ən sē),USA pronunciation n., pl. -cies. - the state or quality of being efficient;
competency in performance. - accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort:The assembly line increased industry's efficiency.
- Business, Mechanicsthe ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.
- See efficiency apartment.
- Latin efficientia, equivalent. to efficient- (see efficient) + -ia -y3
- 1585–95
Collins Concise English Dictionary © HarperCollins Publishers:: efficiency /ɪˈfɪʃənsɪ/ n ( pl -cies)- the quality or state of being efficient; competence; effectiveness
- the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage
ef•fi•cient /ɪˈfɪʃənt/USA pronunciation adj. - performing or functioning effectively with the least waste of time and effort; competent: an efficient secretary.
ef•fi•cien•cy /ɪˈfɪʃənsi/USA pronunciation n. [uncountable]ef•fi•cient•ly, adv. See -fec-. WordReference Random House Unabridged Dictionary of American English © 2024ef•fi•cient (i fish′ənt),USA pronunciation adj. - 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. - satisfactory and economical to use:Our new air conditioner is more efficient than our old one.
- producing an effect, as a cause;
causative. - Businessutilizing a particular commodity or product with maximum efficiency (usually used in combination):a fuel-efficient engine.
- Latin efficient- (stem of efficiēns), equivalent. to ef- ef- + fic-, combining form of facere to make, do1 + -ent- -ent
- Middle French)
- Middle English (1350–1400
- 1.See corresponding entry in Unabridged effectual. See effective.
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