shale

noun

: a fissile rock that is formed by the consolidation of clay, mud, or silt, has a finely stratified or laminated structure, and is composed of minerals essentially unaltered since deposition
shaley adjective
or less commonly shaly

Examples of shale 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.
Oil market dynamics have opened a window for OPEC+ to claw back market share lost to US shale, investors and experts said on the sidelines of a Gulf energy conference, with expectations growing that the group will increase supply despite short-term price pressure. semafor.com, 2 Oct. 2025 Then, in the early 2010s, fracking and horizontal drilling technology unlocked the deposits hiding in the shale bed and unleashed vast wealth that went beyond the county residents’ wildest dreams. Mitch Moxley, Rolling Stone, 27 Sep. 2025 This growth is a continuance of the surge in oil production resulting from the shale boom that began earlier this century. Robert Rapier, Forbes.com, 18 Sep. 2025 The natural rate of decline in output from the world's oil and gas fields is speeding up, owing to more reliance on shale and deep offshore resources, the International Energy Agency said on Tuesday. Seher Dareen, Reuters, 15 Sep. 2025 See All Example Sentences for shale

Word History

Etymology

probably from obsolete or dialect shale scale, shell, from Middle English, from Old English scealu — more at shell

First Known Use

1747, in the meaning defined above

Time Traveler
The first known use of shale was in 1747

Browse Nearby Words

Cite this Entry

“Shale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/shale. Accessed 9 Oct. 2025.

Kids Definition

shale

noun
: a rock with a fine grain formed from clay, mud, or silt
shaley adjective

More from Merriam-Webster on shale

Last Updated: - Updated example sentences
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