- The definition of lava is hot, molten rock.
Hot molten rock that spews from a volcano is an example of lava.
Lava spewing from a volcano.
- melted rock issuing from a volcano
- such rock when solidified by cooling
Origin of lavaItalian ; from dialect, dialectal (Neapolitan) lave ; from Classical Latin labes, a fall, subsidence ; from labi, to slide ; from Indo-European base an unverified form lāb-, to hang down from source lap, lip
- Molten rock that reaches the earth's surface through a volcano or fissure.
- The rock formed by the cooling and solidifying of molten rock.
Origin of lavaItalian, perhaps from Latin lābēs, fall, from Latin lābī, to fall. Word History: Appropriately, lava was named by people living near Mount Vesuvius. The only active volcano on the European mainland, Vesuvius has erupted frequently since Pompeii and Herculaneum were buried by it in AD 79. The Neapolitans who lived in the vicinity took the Italian word lava, meaning “a stream caused suddenly by rain,” and applied it to the streams of molten rock coming down the sides of Vesuvius. The term was then taken into Standard Italian, where it came to mean the rock in both its molten and its solidified states. The Italian word was borrowed into English around the middle of the 18th century.
(countable and uncountable, plural lavas)
Geologists make a distinction between magma (molten rock underground) and lava (molten rock on the surface).