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
The iPhone 17 Air is rumored to measure around 5.5mm in thickness.
—
Prakhar Khanna, Forbes.com, 13 Apr. 2025
Quilted or padded cloth playmats range in thickness between 0.2 and 0.8 inches.
—Bestreviews, Mercury News, 11 Apr. 2025
The thickness and composition of the Martian atmosphere over time is also an open question.
—Jonathan O’Callaghan, JSTOR Daily, 10 Apr. 2025
Leather plays a key feature on the thickness of the cushions — with or without buttons — and on the underskirt and the piping.
—Luisa Zargani, Footwear News, 8 Apr. 2025
See All Example Sentences for thickness
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Prakhar Khanna, Forbes.com, 13 Apr. 2025
Quilted or padded cloth playmats range in thickness between 0.2 and 0.8 inches.
—Bestreviews, Mercury News, 11 Apr. 2025
The thickness and composition of the Martian atmosphere over time is also an open question.
—Jonathan O’Callaghan, JSTOR Daily, 10 Apr. 2025
Leather plays a key feature on the thickness of the cushions — with or without buttons — and on the underskirt and the piping.
—Luisa Zargani, Footwear News, 8 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 23 Apr. 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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