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flatten definition

flat·ten (flat′'n)

transitive verb

  1. to make flat or flatter
  2. Informal to knock down; make prostrate
  3. to level to the ground

intransitive verb

  1. to become flat or flatter
  2. to become prostrate

Related Forms:

flatten Idioms

flatten out

  1. to make or become flat or flatter by spreading out
  2. Aeron. level off (sense ) (at level)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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