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.
—
Annie Blackman, Allure, 5 June 2025
The dial and movement are housed in a 40mm 316L polished stainless steel case with a thickness of 14.90mm.
—Anthony Demarco, Forbes.com, 4 June 2025
The sateen shell kept cool, and the weight and thickness of this insert were ideal and not too unwieldy, too fluffy or unmanageable.
—Rebecca Jones, Southern Living, 30 May 2025
Set aside and keep warm Cut dough into quarters and work with one piece of dough at a time and roll each into long ropes about 18 inches and thickness of your middle finger.
—Mary Ann Esposito, Boston Herald, 28 May 2025
See All Example Sentences for thickness
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Annie Blackman, Allure, 5 June 2025
The dial and movement are housed in a 40mm 316L polished stainless steel case with a thickness of 14.90mm.
—Anthony Demarco, Forbes.com, 4 June 2025
The sateen shell kept cool, and the weight and thickness of this insert were ideal and not too unwieldy, too fluffy or unmanageable.
—Rebecca Jones, Southern Living, 30 May 2025
Set aside and keep warm Cut dough into quarters and work with one piece of dough at a time and roll each into long ropes about 18 inches and thickness of your middle finger.
—Mary Ann Esposito, Boston Herald, 28 May 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 10 Jun. 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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