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
Synonyms
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
One of the most striking findings was a widespread reduction in gray matter volume (GMV) and cortical thickness across most areas of the cerebral cortex.
—
William A. Haseltine, Forbes, 10 Jan. 2025
Our favorite mats come in a wide array of materials, thicknesses, and sizes, all for your choosing pleasure.
—Jennifer Hussein, Allure, 5 Jan. 2025
The key to perfectly baked cookies is rolling the dough to an even thickness.
—Kaitlyn Yarborough, Southern Living, 2 Jan. 2025
Other standards that made their way into the code strengthen soffits for heavier wind loads, specify thickness of wood structural panels and dictate the size and spacing of ring shank nails used to attach roof decks, the website says.
—Ron Hurtibise, Sun Sentinel, 2 Jan. 2025
See all Example Sentences for thickness 
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William A. Haseltine, Forbes, 10 Jan. 2025
Our favorite mats come in a wide array of materials, thicknesses, and sizes, all for your choosing pleasure.
—Jennifer Hussein, Allure, 5 Jan. 2025
The key to perfectly baked cookies is rolling the dough to an even thickness.
—Kaitlyn Yarborough, Southern Living, 2 Jan. 2025
Other standards that made their way into the code strengthen soffits for heavier wind loads, specify thickness of wood structural panels and dictate the size and spacing of ring shank nails used to attach roof decks, the website says.
—Ron Hurtibise, Sun Sentinel, 2 Jan. 2025
See all Example Sentences for thickness
Dictionary Entries Near thickness
Cite this Entry
“Thickness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thickness. Accessed 18 Jan. 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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