Meaning of “inefficient” in the English Dictionary

"inefficient" in British English

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inefficientadjective

uk /ˌɪn.ɪˈfɪʃ.ənt/ us /ˌɪn.ɪˈfɪʃ.ənt/
inefficiently
adverb uk /ˌɪn.ɪˈfɪʃ.ənt.li/ us /ˌɪn.ɪˈfɪʃ.ənt.li/

The hotel is inefficiently run.
inefficiency
noun [ C or U ] uk /ˌɪn.ɪˈfɪʃ.ən.si/ us /ˌɪn.ɪˈfɪʃ.ən.si/

They were accused of gross inefficiency in their handling of the case.

(Definition of “inefficient” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"inefficient" in American English

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inefficientadjective

us /ˌɪn·ɪˈfɪʃ·ənt/

wasting time, money, energy, or other valuable possessions or qualities:

Many of their industries are hopelessly inefficient.
inefficiency
noun [ U ] us /ˌɪn·ɪˈfɪʃ·ən·si/

She promised to end government inefficiency.
inefficiently
adverb us /ˌɪn·əˈfɪʃ·ənt·li/

He uses his time inefficiently.

(Definition of “inefficient” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"inefficient" in Business English

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inefficientadjective

uk /ˌɪnɪˈfɪʃənt/ us

using resources such as time, materials, or labour in a way that wastes them:

There are too many big, inefficient companies in almost every part of the economy.
extremely/highly/increasingly inefficient
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inefficiently
adverb /ˌɪnɪˈfɪʃəntli/

Governments spend money inefficiently and get little return for it.

(Definition of “inefficient” from the Cambridge Business English Dictionary © Cambridge University Press)