Definition from Wiktionary, the free dictionary
See also efficiënt
1398, "making," from Latin efficientem (nominative efficiens), preposition of efficere "work out, accomplish" (see effect). Meaning "productive, skilled" is from 1787. Efficiency apartment is first recorded 1930, American English. 
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- Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy.
- An efficient process would automate all the routine work.
- Our cleaners are almost too efficient: they throw away anything left out on a desk.
- Using a particular proportion of available energy.
- The motor is only 20% efficient at that temperature.
Derived terms 
Related terms 
Terms etymologically related to efficient
making good use of resources
using a particular proportion of available energy
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Translations to be checked
- third-person plural future active indicative of efficiō