Meaning of EFFICIENT in English

/ ɪˈfɪʃnt; NAmE / adjective

doing sth well and thoroughly with no waste of time, money, or energy :

an efficient secretary

efficient heating equipment

the efficient use of energy

As we get older, our bodies become less efficient at burning up calories.

fuel-efficient cars (= that do not use much fuel)

OPP inefficient

►  ef·fi·cient·ly adverb :

a very efficiently organized event



late Middle English (in the sense making, causing ): from Latin efficient- accomplishing, from the verb efficere accomplish, from ex- out, thoroughly + facere do, make. The current sense dates from the late 18th cent.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.