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

The end result was the most complicated sports watch of its age with an impressive thickness of just 7.5mm, just 0.4mm thicker than the revolutionary ref 5402 but with an abundance more complexity. —Thomas Wojtowicz, Forbes, 28 Feb. 2025

That being said, this finishing layer is generally extremely thin—only about the thickness of a couple of sheets of paper. —Daley Quinn, Southern Living, 28 Feb. 2025

Size: While most mattresses offer twin through California king sizes, the thickness is another important factor. —Nashia Baker, Architectural Digest, 27 Feb. 2025

The Earth's crust varies in thickness from about 5 to 75 km (3 to 47 miles), with the thinnest parts tending to be way out in the deep ocean. —New Atlas, 23 Feb. 2025

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