: any of various dark-colored fine-grained igneous rocks (such as basalt) used especially in road making

Examples of traprock in a Sentence

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.
Among their core complaints was that the plan entailed extensive blasting to flatten the traprock along Route 44 at Canton’s eastern gateway. Don Stacom, courant.com, 23 Feb. 2022 It’s made of diabase traprock, which contains iron that causes the cliffs to look lumpen and rusty in the wrong light, precise and resplendent in the right one. Christian Wiman, Harper's magazine, 20 Jan. 2020

Word History

Etymology

trap entry 5

First Known Use

1813, in the meaning defined above

Time Traveler
The first known use of traprock was in 1813

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Cite this Entry

“Traprock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/traprock. Accessed 24 Mar. 2025.

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