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
Try out castor oil at night on your lashes to boost length and thickness with continual use.
—
Kaitlyn Yarborough, Southern Living, 24 Nov. 2025
Blancpain has upped the ante by integrating it in the manufacture movement rather than using a module that would cover parts of the movement and add thickness.
—Thor Svaboe, Robb Report, 24 Nov. 2025
Wood Moderately insulating due to its thickness, wood is slower to freeze than clay or metal.
—Erica Browne Grivas, Better Homes & Gardens, 22 Nov. 2025
Having worked in professional kitchens, Miradi designed a specific method in collaboration with plaster workers, using a trowel in a brushstroke style with a particular thickness of plaster mud to achieve a uniquely layered look.
—Alexis Benveniste, Architectural Digest, 21 Nov. 2025
See All Example Sentences for thickness
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Kaitlyn Yarborough, Southern Living, 24 Nov. 2025
Blancpain has upped the ante by integrating it in the manufacture movement rather than using a module that would cover parts of the movement and add thickness.
—Thor Svaboe, Robb Report, 24 Nov. 2025
Wood Moderately insulating due to its thickness, wood is slower to freeze than clay or metal.
—Erica Browne Grivas, Better Homes & Gardens, 22 Nov. 2025
Having worked in professional kitchens, Miradi designed a specific method in collaboration with plaster workers, using a trowel in a brushstroke style with a particular thickness of plaster mud to achieve a uniquely layered look.
—Alexis Benveniste, Architectural Digest, 21 Nov. 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 28 Nov. 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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