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Definition of "astronomical" []

  • Of or relating to astronomy. (adjective)
  • Of enormous magnitude; immense: an astronomical increase in the deficit. (adjective)
  • Enormously large; immense (adjective)

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.

  • Of or relating to astronomy (adjective)

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Use "astronomical" in a sentence
  • "In addition, it took 11 years of observing to tease out the presence of the habitable zone planet, a short time in astronomical terms."
  • ""One hundred million years to a human seems an awful long time, but in astronomical time periods, that's nothing compared to the life of the stars.""
  • "WASHINGTON & mdash; The cost of NASA's replacement for the Hubble Space Telescope is giving new meaning to the word astronomical, growing another $1.5 billion, according to a new internal NASA study released Wednesday."