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Definition of "volcano" []

  • An opening in the earth's crust through which molten lava, ash, and gases are ejected. (noun)
  • A similar opening on the surface of another planet. (noun)
  • A mountain formed by the materials ejected from a volcano. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "volcano" in a sentence
  • "If under the term volcano be included all mountains which have been in a state of eruption within the historical period, those which have a true volcanic form, together with those that still exhibit on their flanks matter ejected from a crater, we may conclude that there are at least 100 such mountains in the Japanese empire."
  • "The summit of the volcano is around 5000 ft (1650 m) above sea level."
  • "Yesterday, scientists issued what they call a volcano advisory, that is the highest warning before an eruption."