[ in-i-fish-uh nt ]
/ ˌɪn ɪˈfɪʃ ənt /


not efficient; unable to effect or achieve the desired result with reasonable economy of means.
lacking in ability, incompetent.


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Origin of inefficient

First recorded in 1740–50; in-3 + efficient

OTHER WORDS FROM inefficient

in·ef·fi·cient·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for inefficient

British Dictionary definitions for inefficient

/ (ˌɪnɪˈfɪʃənt) /


unable to perform a task or function to the best advantage; wasteful or incompetent
unable to produce the desired result

Derived forms of inefficient

inefficiency, nouninefficiently, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012