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

1655–65; un-1 + improved
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for unimproved

Historical Examples

  • The landscape in the vicinity was unimproved, but not rural.

    Urban Sketches

    Bret Harte

  • As the days passed he could see plainly that she was unimproved.

  • The Justices do not understand the taxation of unimproved land.

  • At 78 m. is the junction with an unimproved country dirt road.

  • There are also 200 miles of unimproved roads known as “feeders.”

British Dictionary definitions for unimproved


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

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Online Etymology Dictionary, © 2010 Douglas Harper