Definition of obsidian
: a dark natural glass formed by the cooling of molten lava
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Recent Examples of obsidian from the Web
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The tall flow of black obsidian is in stark contrast to the blue lakes and lush green forest that surrounds it.
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The flow was the final stage of a bigger eruption, formed as magma containing little gas made its way to the surface and cooled, creating obsidian.
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The striking ebony hue feels at once ancient and modern: Here is the enveloping matte darkness of Anish Kapoor’s Vantablack paint and the glittering primordial obsidian of lava rock.
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Just pray that no one is carrying around obsidian on Halloween night.
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As Samwell Tarly discovers in his research at the Citadel, Dragonstone is a volcanic island which contains large amounts of dragonglass (obsidian, for all you modern-day folks).
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The significance of dragonglass (obsidian) this season, along with Gendry's skill as a smith highlights the importance of Davos' fake name for him.
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Known as obsidian in the real world, dragonglass kills white walkers and also creates them if stabbed into a human heart by the Children of the Forest.
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A few of the victims were bound before death, and some have arrowheads of stone and obsidian embedded in their bones.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'obsidian.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
OBSIDIAN Defined for English Language Learners
Definition of obsidian for English Language Learners
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: a dark natural glass that forms when lava cools
OBSIDIAN Defined for Kids
Definition of obsidian for Students
: a smooth dark rock formed by the cooling of lava
Learn More about obsidian
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See words that rhyme with obsidian Britannica.com: Encyclopedia article about obsidian
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