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

Related Words for unimproved

unchanged, undeveloped, unaltered, unrestored

Examples from the Web for unimproved

Historical Examples of unimproved

British Dictionary definitions for unimproved



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