Definition of insoluble
- an insoluble problem
a substance insoluble in water
the seemingly insoluble mystery concerning the identity of the people who built these ancient structures
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'insoluble.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: not able to be solved or explained
: not able to be dissolved in a liquid
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