volcano: Meaning and Definition of

vol•ca•no

Pronunciation: (vol-kā'nō), [key]
— pl. -noes, -nos.
  1. a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
  2. a mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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