rock salt

noun

: common salt occurring in solid form as a mineral
also : salt artificially prepared in large crystals or masses

Examples of rock salt in a Sentence

I put some rock salt on the sidewalk to melt the ice.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Several substances like charcoal, rock salt, cat litter, and baking soda can help to draw moisture out of the air. Hallie Milstein, Southern Living, 20 Feb. 2026 Keep sidewalks and parking lots ice-free with rock salt, calcium chloride, Purple Heat, or another de-icer. Timothy Dale, The Spruce, 19 Feb. 2026 Pittsburgh-area municipalities are frustrated over rock salt delivery delays. Mamie Bah, CBS News, 16 Feb. 2026 Avoid using fine play sand; instead, use sharp sand and mix it with rock salt in a large container or bucket. Timothy Dale, Better Homes & Gardens, 10 Feb. 2026 See All Example Sentences for rock salt

Word History

First Known Use

1693, in the meaning defined above

Time Traveler
The first known use of rock salt was in 1693

Browse Nearby Words

Cite this Entry

“Rock salt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rock%20salt. Accessed 23 Feb. 2026.

Kids Definition

rock salt

noun
: common salt in large crystals or masses

More from Merriam-Webster on rock salt

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