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
That’s a third of the thickness of the stones used in Color Blossom’s jewelry designs.
—
Lily Templeton, Footwear News, 15 May 2026
Let rest for 5 to 10 minutes depending on the thickness, giving the juices time to redistribute before cutting in.
—Katie Rosenhouse, Southern Living, 15 May 2026
While Spalding poles still offer significant durability, Goalrilla’s additional thickness provides more strength and more resistance to the elements.
—Bestreviews, Chicago Tribune, 14 May 2026
The scientists produced both opaque and semi-transparent versions by adjusting the thickness of the perovskite layer.
—Aamir Khollam, Interesting Engineering, 14 May 2026
See All Example Sentences for thickness
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Lily Templeton, Footwear News, 15 May 2026
Let rest for 5 to 10 minutes depending on the thickness, giving the juices time to redistribute before cutting in.
—Katie Rosenhouse, Southern Living, 15 May 2026
While Spalding poles still offer significant durability, Goalrilla’s additional thickness provides more strength and more resistance to the elements.
—Bestreviews, Chicago Tribune, 14 May 2026
The scientists produced both opaque and semi-transparent versions by adjusting the thickness of the perovskite layer.
—Aamir Khollam, Interesting Engineering, 14 May 2026
See All Example Sentences for thickness
Cite this Entry
“Thickness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thickness. Accessed 20 May. 2026.
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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