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Synonyms

unsolved

British  
/ ʌnˈsɒlvd /

adjective

  1. not having been solved or explained

    several unsolved murders
"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

Other Word Forms

  • unsolvable adjective

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The partnership will seek to deploy autonomous vehicles in unsolved areas, such as the intersection of roadways, bike lanes and road-adjacent spaces.

From The Wall Street Journal • Mar. 31, 2026

She added it was "more unusual than not that we are in this situation", but the team was determined to get to the bottom of this "big unsolved case".

From BBC • Mar. 8, 2026

News of Guthrie’s abduction 18 days ago has triggered a swell of public interest that’s grown as the case goes unsolved.

From Los Angeles Times • Feb. 18, 2026

A lot of research has gone into eliminating hallucinations, but it remains an unsolved problem.

From Barron's • Feb. 6, 2026

Perhaps the biggest of these unsolved problems is to establish human history as a historical science, on a par with recognized historical sciences such as evolutionary biology, geology, and climatology.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.