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
While there are certainly products that can be used across different hair textures, lengths, curl patterns, thicknesses, colors (natural and unnatural), and needs, hair products are often created with specific consumers in mind.
—
Jailynn Taylor, Allure, 30 Apr. 2025
Low magnesium levels can reduce bone density (thickness and strength), increasing your risk of fractures.
—Kirstyn Hill, Pharmd, Mph, Health, 22 Apr. 2025
The liquid scalp serum works at the molecular level to trigger hair growth while strengthening its structure and maintaining hair-bonding keratin levels, improving hair volume and thickness.
—Celia Shatzman, Forbes.com, 16 Apr. 2025
Cover loin with plastic wrap; pound to an even 3/4-inch thickness.
—Kimberly Holland, Southern Living, 12 Apr. 2025
See All Example Sentences for thickness
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Jailynn Taylor, Allure, 30 Apr. 2025
Low magnesium levels can reduce bone density (thickness and strength), increasing your risk of fractures.
—Kirstyn Hill, Pharmd, Mph, Health, 22 Apr. 2025
The liquid scalp serum works at the molecular level to trigger hair growth while strengthening its structure and maintaining hair-bonding keratin levels, improving hair volume and thickness.
—Celia Shatzman, Forbes.com, 16 Apr. 2025
Cover loin with plastic wrap; pound to an even 3/4-inch thickness.
—Kimberly Holland, Southern Living, 12 Apr. 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 5 May. 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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