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Definition of "formation" []

  • The act or process of forming something or of taking form. (noun)
  • Something formed: beautiful cloud formations. (noun)
  • The manner or style in which something is formed; structure: the distinctive formation of the human eye. (noun)
  • A specified arrangement or deployment, as of troops. (noun)
  • Geology The primary unit of lithostratigraphy, consisting of a succession of strata useful for mapping or description. (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 "formation" in a sentence
  • "Another way of attacking two-seater machines that we use in formation is for three men to go out to try to get at a machine."
  • "Daniel: "Mineral crystals and their formation is a self-assembled process that is dependent on physical and chemical structural information.""
  • "Mineral crystals and their formation is a self-assembled process that is dependent on physical and chemical structural information."