efficiency

• POS: Noun
• HYPHEN: ef=fi=cien=cy

CIDE DICTIONARY

efficiency, n. [L. efficientia.].

•  The quality of being efficient or producing an effect or effects; efficient power; effectual agency.  [1913 Webster]

  "The manner of this divine efficiency being far above us."  [1913 Webster]
•  The ratio of useful work to energy expended.  Rankine.  [1913 Webster]

efficiency of a heat engine, the ratio of the work done by an engine, to the work due to the heat supplied to it.

OXFORD DICTIONARY

efficiency, n. (pl. -ies)
1 the state or quality of being efficient.
2 Mech. & Physics the ratio of useful work performed to the total energy expended or heat taken in.

Idiom

efficiency bar a point on a salary scale requiring evidence of efficiency for further promotion.

Etymology

L efficientia (as EFFICIENT)

THESAURUS

efficiency

ability, able, ableness, address, adept, adeptness, adequacy, adroitness, airmanship, applicability, artfulness, artisanship, artistry, availability, bravura, brilliance, caliber, capability, capable, capableness, capacity, cleverness, command, competence, competent, control, coordination, craft, craftsmanship, cunning, deftness, dexterity, dexterousness, dextrousness, diplomacy, effectiveness, effectual, efficacious, efficaciousness, efficacy, efficient, experience, expert, expertise, expertness, facility, faculty, finesse, fitness, fitted, flair, functionality, genius, grace, grip, handiness, helpfulness, horsemanship, ingeniousness, ingenuity, know-how, marksmanship, masterly, mastership, mastery, operability, performance, potency, practicability, practical ability, practical utility, practicality, productivity, proficiency, proficient, profitability, prowess, qualification, qualified, quickness, readiness, resource, resourcefulness, savoir-faire, savvy, seamanship, serviceability, skill, skilled, skillful, skillfulness, style, sufficiency, susceptibility, tact, tactfulness, talent, technical brilliance, technical mastery, technical skill, technique, the goods, the stuff, timing, usability, use, usefulness, utility, utilizability, virtuosity, virtuous, what it takes, wit, wizardry, workmanship

ROGET THESAURUS

efficiency

Utility

N utility, usefulness, efficacy, efficiency, adequacy, service, use, stead, avail, help, applicability, subservience, function, value, worth, money's worth, productiveness, cui bono, utilization, step in the right direction, common weal, commonwealth public good, public interest, utilitarianism, useful, of use, serviceable, proficuous, good for, subservient, conducive, subsidiary, advantageous, profitable, gainful, remunerative, worth one's salt, valuable, prolific, adequate, efficient, efficacious, effective, effectual, expedient, applicable, available, ready, handy, at hand, tangible, commodious, adaptable, of all work, usefully, pro bono publico.

Power

N power, potency, potentiality, jiva, puissance, might, force, energy, dint, right hand, right arm, ascendency, sway, control, prepotency, prepollence, almightiness, omnipotence, authority, strength, ability, ableness, competency, efficacy, efficiency, productivity, expertise (skill), validity, cogency, enablement, vantage ground, influence, pressure, conductivity, elasticity, gravity, electricity, magnetism, galvanism, voltaic electricity, voltaism, electromagnetism, atomic power, nuclear power, thermonuclear power, fuel cell, hydraulic power, water power, hydroelectric power, solar power, solar energy, solar panels, tidal power, wind power, attraction, vis inertiae, vis mortua, vis viva, potential energy, dynamic energy, dynamic friction, dynamic suction, live circuit, live rail, live wire, capability, capacity, quid valeant humeri quid ferre recusent, faculty, quality, attribute, endowment, virtue, gift, property, qualification, susceptibility, powerful, puissant, potential, capable, able, equal to, up to, cogent, valid, efficient, productive, effective, effectual, efficacious, adequate, competent, multipotent, plenipotent, omnipotent, almighty, forcible, (energetic), influential, productive, powerfully, by virtue of, by dint of, a toute force, dos moi pou sto kai kino ten gen, eripuit coelo fulmen sceptrumque tyrannis, fortis cadere cedere non potest.