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  1. The philosophical study of the origin and nature of the universe.
  2. The branch of astronomy concerned with the evolution and structure ofthe universe.
  3. particular account of the origin or structure of the universe.

Collins English Dictionary. Copyright © HarperCollins Publishers Collins Dictionary

  1. The scientific study of the form, content, organization, and evolution of the universe
  2. The branch of metaphysics dealing with the origin and structure of the universe.

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.

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