[ in-suh-fish-uhnt ]
/ ˌɪn səˈfɪʃ ənt /


not sufficient; lacking in what is necessary or required: an insufficient answer.
deficient in force, quality, or amount; inadequate: insufficient protection.

Origin of insufficient

1350–1400; Middle English <Late Latin insufficient- (stem of insufficiēns). See in-3, sufficient

OTHER WORDS FROM insufficient

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

Example sentences from the Web for insufficient

British Dictionary definitions for insufficient

/ (ˌɪnsəˈfɪʃənt) /


not sufficient; inadequate or deficient

Derived forms of insufficient

insufficiently, 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

Medical definitions for insufficient

[ ĭn′sə-fĭshənt ]


Not sufficient.
Incapable of proper functioning.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.