Definition of thicken
- the mist thickened
- the plot thickens
- thicken gravy with flour
- alcohol thickened his speech
I thickened the gravy with flour.
When the mixture thickens, add the remaining ingredients.
The fog thickened when night fell.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thicken.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: to make (something) thick or thicker or to become thick or thicker
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