hard·​ness | \ ˈhärd-nəs How to pronounce hardness (audio) \

Definition of hardness

1 : the quality or state of being hard
2a : the cohesion of the particles on the surface of a mineral as determined by its capacity to scratch another or be itself scratched — compare mohs' scale
b : resistance of metal to indentation under a static load or to scratching

Examples of hardness in a Sentence

the hardness of a diamond The wood's hardness makes it suitable for carving.
Recent Examples on the Web Many of these also have features like a timer or hardness settings, like our pick from Breville. Brigitt Earley, Good Housekeeping, 16 June 2022 The case, meanwhile, is milled from a single piece of 904L stainless steel—a painstaking process due to its hardness. Paige Reddinger, Robb Report, 28 May 2022 There is a measure of hardness called Janka to rank hardwood. Nafeesah Allen, Better Homes & Gardens, 13 May 2022 The food processor is not suitable for grinding a blend of spices of varying hardness and size. Mayukh Sen, The New Yorker, 30 Oct. 2021 For some runners, the variables of shoe geometries, midsole hardness, or excessive stabilizing technologies can push them outside of their preferred motion path. Brian Metzler, Outside Online, 3 Sep. 2020 Meanwhile, Biel does fine work in a slippery role, skating easily between superficial warmth and impenetrable hardness, effortless charisma and frenzied desperation. Angie Han, The Hollywood Reporter, 6 May 2022 Or maybe some of them are hard, but their hardness isn’t of a kind that lends itself to secure encryption. Quanta Magazine, 18 Apr. 2022 The properties of all those materials are carefully controlled to ensure uniformity in weight, size, hardness, elasticity, and so forth—right down to the color of the rubber. Jennifer Ouellette, Ars Technica, 14 Apr. 2022 See More

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

First Known Use of hardness

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

Learn More About hardness

Time Traveler for hardness

Time Traveler

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

See more words from the same century

Dictionary Entries Near hardness




See More Nearby Entries 

Statistics for hardness

Last Updated

28 Jun 2022

Cite this Entry

“Hardness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hardness. Accessed 28 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on hardness

Nglish: Translation of hardness for Spanish Speakers

Britannica English: Translation of hardness for Arabic Speakers

Britannica.com: Encyclopedia article about hardness


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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