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 of thickness

• consistency
• consistence
• density

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

Moreover, patterns can be tuned by changing the thickness of the anisotropic layer or the intensity of the electron beam. —Prabhat Ranjan Mishra, Interesting Engineering, 24 May 2026

In yogurt’s case, bacteria convert the natural sugar in milk into lactic acid, which is what produces that signature tang and thickness. —Samantha Agate, Charlotte Observer, 23 May 2026

Asphalt can be installed at different thicknesses for different needs, and porous asphalt is becoming more popular. —Aya Diab, Fortune, 23 May 2026

But burgers are different than steaks, and the thickness of your burger can actually play a big role in determining whether flipping once or multiple times makes the most sense. —Katie Rosenhouse, Southern Living, 22 May 2026

Word History

First Known Use

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

Rhymes for thickness

• quickness
• sickness
• homesickness
• seasickness

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