: 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.
The fleeing bear apparently had come to the foot of one of those vertical lava cliffs that make the walls of these canyons straight-sided and impassable in places. Frank C. Hibben, Outdoor Life, 15 July 2026 Scientists have long theorized about how once-molten lava cooled and formed the massive columns that make up the geologic wonder. ABC News, 13 July 2026 Even more striking, the course was built directly into black lava beds (officially called ancient basalt rock formations) from an inactive volcano about 20 minutes away. Scott Kramer, Forbes.com, 10 July 2026 There are a lot of action sequences where Moana and Maui have to get themselves out of harrowing situations, including a fairly sizable lava monster that might freak out really little children. Brian Truitt, USA Today, 9 July 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 18 Jul. 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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