thick·​ness | \ˈthik-nəs \

Definition of thickness 

1 : the smallest of three dimensions length, width, and thickness

2 : the quality or state of being thick

3a : viscous consistency boiled to the thickness of honey

b : the condition of being smoky, foul, or foggy

4 : the thick part of something

7 : layer, ply, sheet a single thickness of canvas

Keep scrolling for more

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.
See More

Recent Examples on the Web

Unfold the puff pastry; roll it between two sheets of parchment paper or plastic wrap to smooth it out and reduce the thickness. Bonnie S. Benwick, The Seattle Times, "For a different Thanksgiving dessert, swap pie for parfaits," 13 Nov. 2018 The new MacBook Air weighs 2.75 pounds and has a thickness of just 15.6mm. Valentina Palladino, Ars Technica, "Apple updates MacBook Air with Retina display, Touch ID," 30 Oct. 2018 That ultimately tells scientists the thickness of the ice sheets below the satellite. Loren Grush, The Verge, "Watch the last flight of the Delta II rocket as it puts a laser-pulsing satellite into orbit," 14 Sep. 2018 When baking, measure the thickness of the fish and plan on 10 minutes per inch (5 minutes on each side), and bake at 400 to 450 degrees F. 6. Emily Main, Good Housekeeping, "10 Healthiest Fish on the Planet," 25 June 2015 Transfer to double thickness of paper towels to drain. Grace Young, ELLE Decor, "Spanish Culinary Ambassador," 5 July 2012 The team narrowed it down to four variables: the wrist angle of the robot (the angle of the rock relative to the water), the arm angle of the robot (which changes the path of the rock), and the rocks used (variations in diameter and thickness). Laura Yan, Popular Mechanics, "Ex-NASA Engineer Made the Perfect Rock Skipping Robot," 4 Aug. 2018 The roof and walls are supported by 57 trusses that vary in thickness to support the overhang of the curved eave. Liz Stinson, Curbed, "Undulating bamboo house looks like it’s wearing a hat," 24 July 2018 The treatment would cost anywhere between $20 to $40 dollars depending on my hair's thickness and length, the stylist told me. Brynn Mannino, Woman's Day, "Georgia Woman Charged Extra for Mani-Pedi for Being Overweight," 27 Aug. 2010

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thickness.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of thickness

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

Keep scrolling for more

Learn More about thickness

Statistics for thickness

Last Updated

5 Dec 2018

Look-up Popularity

Time Traveler for thickness

The first known use of thickness was before the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for thickness



English Language Learners Definition of thickness

: the distance between the top and bottom or front and back surfaces of something : a measurement of how thick something is

: the quality of being thick

: a layer or sheet of some material


thick·​ness | \ˈthik-nəs \

Kids Definition of thickness

1 : the quality or state of being thick

2 : the smallest of three dimensions length, width, and thickness

Keep scrolling for more

Comments on thickness

What made you want to look up thickness? Please tell us where you read or heard it (including the quote, if possible).


to enclose within walls

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!