: molten rock that issues from a volcano or from a fissure in the surface of a planet (such as earth) or moon
also : such rock that has cooled and hardened

Examples of lava in a Sentence

a flow of molten lava
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.
Volcanologists could use the technology to map internal magma chambers and lava tubes to help predict eruptions. — Mrigakshi Dixit, Interesting Engineering, 2 Oct. 2026 And not just any velociraptor, but the enraged dinosaur that pushed franchise champion Rachel Reilly into a volcano, thereby burning the reality TV icon to a crisp in a sea of lava. — Dalton Ross, Entertainment Weekly, 1 Oct. 2026 How would a body look if it were left for a year on a lava field or stuck for three years in an airtight suitcase? — HubSpot, 1 Oct. 2026 With these findings, this discovery also supports a growing conclusion amongst scientists that the majority of lava worlds likely have atmospheres. — Chelsea Gohd, Space.com, 29 Sep. 2026 See All Example Sentences for lava

Word History

Etymology

Italian, ultimately from Latin labes fall; akin to Latin labi to slide — more at sleep

First Known Use

1759, in the meaning defined above

Time Traveler
The first known use of lava was in 1759

Cite this Entry

“Lava.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lava. Accessed 9 Oct. 2026.

Kids Definition

: melted rock coming from a volcano
also : such rock that has cooled and hardened

More from Merriam-Webster on lava

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