Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

efficiency

play
noun ef·fi·cien·cy \i-ˈfi-shən-sē\

Simple Definition of efficiency

  • : the ability to do something or produce something without wasting materials, time, or energy : the quality or degree of being efficient ( technical )

Full Definition of efficiency

plural ef·fi·cien·cies

  1. 1 :  the quality or degree of being efficient

  2. 2 a :  efficient operation b (1) :  effective operation as measured by a comparison of production with cost (as in energy, time, and money) (2) :  the ratio of the useful energy delivered by a dynamic system to the energy supplied to it

  3. 3 :  efficiency apartment

Examples of efficiency

  1. Because of her efficiency, we got all the work done in a few hours.

  2. The factory was operating at peak efficiency.

  3. A furnace with 80 percent fuel efficiency wastes 20 percent of its fuel.

  4. The company is trying to lower costs and improve efficiencies.



1633

First Known Use of efficiency

1633


EFFICIENCY Defined for Kids

efficiency

play
noun ef·fi·cien·cy \i-ˈfi-shən-sē\

Definition of efficiency

plural ef·fi·cien·cies

  1. :  the ability to do something or produce something without waste





Seen and Heard

What made you want to look up efficiency? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ