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

The Nebraska researchers also found that hafnia becomes more stable as its thickness decreases. — Aamir Khollam, Interesting Engineering, 26 Sep. 2026

The size of the gravel used in your patching material depends on the thickness of the patch. — Tim Carter, Hartford Courant, 26 Sep. 2026

The amount depends on how much hair has been lost, the size of the area being treated, donor density, hair thickness and the level of coverage the patient wants. — Ascend Agency, The Orlando Sentinel, 25 Sep. 2026

Variations in thickness, color and visible fibers remain part of the finished surface. — Alexandra Harrell, Footwear News, 23 Sep. 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