thickness

noun

thick·​ness ˈthik-nəs 

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

: concentration, density

6

: stupidity, dullness

7

: layer, ply, sheet

a single thickness of canvas

Synonyms

• consistence
• consistency
• density
• viscidity
• viscosity

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

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Kids 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