Volcano Definition

vŏl-kānō

volcanoes, volcanos

noun

volcanoes, volcanos

A vent in the earth's crust through which molten rock (lava), rock fragments, gases, ashes, etc. are ejected from the earth's interior: a volcano is active while erupting, dormant during a long period of inactivity, or extinct when all activity has finally ceased.

Webster's New World

A similar opening on the surface of another planet.

American Heritage

A cone-shaped hill or mountain, wholly or chiefly of volcanic materials, built up around the vent, usually so as to form a crater.

Webster's New World

A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.

Wiktionary

Synonyms:

Synonyms:
vent

Other Word Forms of Volcano

Noun

Singular:

volcano

Plural:

volcanoes, volcanos

Origin of Volcano

Italian from Spanish volcán or Portuguese volcão both probably from Latin volcānus, vulcānus fire, flames from Volcānus Vulcan

From American Heritage Dictionary of the English Language, 5th Edition
From Italian vulcano, from Latin Vulcanus (“Vulcan") the Roman god of fire and metalworking.

From Wiktionary