hardness

noun

hard·​ness ˈhärd-nəs How to pronounce hardness (audio)
1
: the quality or state of being hard
2
a
: 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 Water can be harder in some places around the country, and the level of hardness can make one city better for a good hair day than another. Sophia Panych, Allure, 2 Apr. 2024 The spears and other tools were carved from spruce, larch, and pine, species that grew many kilometers away from the lake and combined hardness with elasticity. Byandrew Curry, science.org, 1 Apr. 2024 The Vince Staples Show is frequently laugh-out-loud funny, but there’s a hardness to it — and the series’ protagonist — that feels both unexpected and authentic. Kristen Baldwin, EW.com, 15 Feb. 2024 During that time, most of the minerals are separated out, so the ice has extremely low levels of hardness and few, if any, impurities. Tori Latham, Robb Report, 1 Feb. 2024 In the realm of plastics processing, a firm can achieve a competitive edge through its in-depth expertise in material properties, such as durability and hardness. Maximilian Kramer, Forbes, 12 Feb. 2024 Calcium is a mineral that supports your bone and teeth structure and hardness. Health Editorial Team, Health, 9 Feb. 2024 In an update provided on September 6, 2023, Exponent confirmed that certain material formulations used in the O-ring rubber could lose hardness over time. Jonathan M. Gitlin, Ars Technica, 2 Oct. 2023 On what’s known as the Mohs hardness scale, pumice is 6.0 to 6.5, only slightly higher than glass, at 5.5. Jeanne Huber, Washington Post, 5 Jan. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hardness.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

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

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

Dictionary Entries Near hardness

Cite this Entry

“Hardness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hardness. Accessed 16 Apr. 2024.

Kids Definition

hardness

noun
hard·​ness ˈhärd-nəs How to pronounce hardness (audio)
1
: the quality or state of being hard
2
: the ability of a substance (as a mineral) to scratch another substance or be itself scratched

More from Merriam-Webster on hardness

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