[ uhn-im-proovd ]
/ ˌʌn ɪmˈpruvd /


not developed to full potential, as resources or the mind.
not showing improvement, as one's health, appearance, etc.
(of land) not fitted for a profitable use, as by clearing, cultivation, addition of facilities for dwelling or business purposes, or the like.
not used to advantage; neglected: an unimproved opportunity.
(of animal or plant species) not made more useful or attractive by selective breeding or cultivation.
not enhanced; not increased: Our chance of success is unimproved.

Origin of unimproved

1655–65; un-1 + improved
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unimproved

British Dictionary definitions for unimproved


/ (ˌʌnɪmˈpruːvd) /


not improved or made better
(of land) not cleared, drained, cultivated, etc
neglected; unusedunimproved resources
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

Word Origin and History for unimproved



1660s, "not made better," from un- (1) "not" + past participle of improve. Sense of "not developed or taken advantage of" (of land) is recorded from 1781.

Online Etymology Dictionary, © 2010 Douglas Harper