Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Cardboard with an appropriate stiffness and thickness for use in making posters.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun uncountable Cardboard material suitable for making posters.
  • noun A piece of such material.
  • noun direct marketing A flyer printed on stiff cardboard, approximately 8.5 by 11 inches, mailed flat.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a cardboard suitable for making posters

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

poster + board

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