: a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite
basaltic adjective

Examples of basalt in a Sentence

Recent Examples on the Web From the cliffs of the Jurassic Coast to the basalt columns of the Giant's Causeway and the dreamy Scottish Highlands, there's plenty to explore in the U.K. South Africa South Africa offers a truly impressive array of landscapes, with something for everyone. Elizabeth Rhodes, Travel + Leisure, 17 May 2024 Another option is to neutralize the acid on site using alkaline minerals such as olivine or basalt. IEEE Spectrum, 26 Mar. 2024 Juventus’s decision to appoint Fabio Capello — his mien, even then, that of a stern immortal hewn from basalt — appeared a safe bet, but many of the others were not. Rory Smith, New York Times, 15 Mar. 2024 Built in 1911 by architects Walter Emory and Marshall Webb in a half-timbered style that harks back to Tudor England, the home has a basalt rock foundation. Kristina Linnea Garcia, San Diego Union-Tribune, 9 Mar. 2024 See all Example Sentences for basalt 

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

Word History


Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egyptian bḫnw

First Known Use

1601, in the meaning defined above

Time Traveler
The first known use of basalt was in 1601

Dictionary Entries Near basalt

Cite this Entry

“Basalt.” Dictionary, Merriam-Webster, Accessed 14 Jun. 2024.

Kids Definition


: a dark gray to black usually fine-grained igneous rock
basaltic adjective

More from Merriam-Webster on basalt

Last Updated: - Updated example sentences
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