1
: the smallest of three dimensions
length, width, and thickness
2
: the quality or state of being thick
3
a
: viscous consistency
boiled to the thickness of honey
b
: the condition of being smoky, foul, or foggy
4
: the thick part of something
5
Examples of thickness in a Sentence
The plank measures two inches in thickness.
the length, circumference, and thickness of the log
Plywood is available in various thicknesses.
Cooking time will vary depending on the thickness of the steak.
I added flour to increase the gravy's thickness.
I was surprised by the thickness of his accent.
Recent Examples on the Web
In the meantime, the team hopes their virtual violin will prove useful for luthiers in the early design process, enabling them to test the effects of various parameters, such as wood type or body thickness.
—
ArsTechnica, 4 May 2026
She's experimented with many hair products over the past three years of taking weight-loss drugs, hoping for her hair to return to its former thickness.
—Laya Neelakandan, CNBC, 2 May 2026
Flying low over glaciers across Alaska and Wyoming, researchers mapped ice thickness, detected debris layers just a few feet thick and revealed internal structures within the ice.
—Samantha Mathewson, Space.com, 1 May 2026
Fabric is just the right thickness.
—Becca Blond, Travel + Leisure, 26 Apr. 2026
See All Example Sentences for thickness
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ArsTechnica, 4 May 2026
She's experimented with many hair products over the past three years of taking weight-loss drugs, hoping for her hair to return to its former thickness.
—Laya Neelakandan, CNBC, 2 May 2026
Flying low over glaciers across Alaska and Wyoming, researchers mapped ice thickness, detected debris layers just a few feet thick and revealed internal structures within the ice.
—Samantha Mathewson, Space.com, 1 May 2026
Fabric is just the right thickness.
—Becca Blond, Travel + Leisure, 26 Apr. 2026
See All Example Sentences for thickness
Cite this Entry
“Thickness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thickness. Accessed 6 May. 2026.
Copy CitationKids Definition
thickness
noun
thick·ness
ˈthik-nəs 
1
: the quality or state of being thick
2
: the smallest of three dimensions
length, width, and thickness
3
: the thick part of something
4
: layer entry 1 sense 2
a single thickness of canvas
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