1
: having a thick or sticky consistency : viscid
viscous secretions
viscous corn syrup
2
technical
: having or characterized by a high resistance to flow
viscous lava
viscously
adverb
viscousness
noun
Examples of viscous in a Sentence
viscous syrup that takes forever to pour from a narrow-neck bottle
Recent Examples on the Web
As my lovely colleagues have astutely pointed out, lip oils are everywhere right now; some are viscous, while others skew slick and liquidy.
—
Megan Decker, refinery29.com, 19 Jan. 2024
The Tequila is full-bodied on the palate, with an oily, viscous quality.
—Joseph V Micallef, Forbes, 29 Oct. 2024
Lucky to be alive and watchful when the ground split open, lucky to be near enough to feel the heat and smell the gas, lucky to see the viscous lava slop slowly downhill like honey from a spoon—even lucky, perhaps, to feel so humbled and afraid.
—Jonah Walters, Longreads, 24 Oct. 2024
The thicker, more viscous part of the egg white surrounding it is called the chalaziferous layer, which takes a little longer to cook than the thinner part of the egg white that hits the pan first.
—Catherine Jessee, Southern Living, 21 Sep. 2024
See all Example Sentences for viscous 
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Megan Decker, refinery29.com, 19 Jan. 2024
The Tequila is full-bodied on the palate, with an oily, viscous quality.
—Joseph V Micallef, Forbes, 29 Oct. 2024
Lucky to be alive and watchful when the ground split open, lucky to be near enough to feel the heat and smell the gas, lucky to see the viscous lava slop slowly downhill like honey from a spoon—even lucky, perhaps, to feel so humbled and afraid.
—Jonah Walters, Longreads, 24 Oct. 2024
The thicker, more viscous part of the egg white surrounding it is called the chalaziferous layer, which takes a little longer to cook than the thinner part of the egg white that hits the pan first.
—Catherine Jessee, Southern Living, 21 Sep. 2024
See all Example Sentences for viscous
Articles Related to viscous
Dictionary Entries Near viscous
Cite this Entry
“Viscous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/viscous. Accessed 21 Nov. 2024.
Copy CitationKids Definition
viscous
adjective
vis·cous
ˈvis-kəs 
1
: having the characteristic of stickiness
2
: having or marked by viscosity
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