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
Protects Against Environmental Factors Chronic sun exposure causes signs of aging, such as redness, color changes (hyperpigmentation), changes in thickness, inflammation, and other signs of damage.
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Carrie Madormo, Verywell Health, 16 Sep. 2025
Across more than 1,000 flights, the aerial surveys collected sea ice and glacier measurements, including height, depth, thickness and ice flow.
—Yasemin Saplakoglu, Quanta Magazine, 15 Sep. 2025
On top of that, a gallery rail system easily accommodates different frame sizes, shapes, weights, and thicknesses, which allows for ultra-layered, completely unique arrangements.
—Lauren Bengtson, Better Homes & Gardens, 14 Sep. 2025
Instead, a higher thread count should be equated to more thickness and durability rather than softness.
—Bestreviews, Mercury News, 12 Sep. 2025
See All Example Sentences for thickness
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Carrie Madormo, Verywell Health, 16 Sep. 2025
Across more than 1,000 flights, the aerial surveys collected sea ice and glacier measurements, including height, depth, thickness and ice flow.
—Yasemin Saplakoglu, Quanta Magazine, 15 Sep. 2025
On top of that, a gallery rail system easily accommodates different frame sizes, shapes, weights, and thicknesses, which allows for ultra-layered, completely unique arrangements.
—Lauren Bengtson, Better Homes & Gardens, 14 Sep. 2025
Instead, a higher thread count should be equated to more thickness and durability rather than softness.
—Bestreviews, Mercury News, 12 Sep. 2025
See All Example Sentences for thickness
Cite this Entry
“Thickness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thickness. Accessed 17 Sep. 2025.
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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