Definition of "cardboard" []

• A material similar to thick, stiff paper, that is made of pressed paper pulp or pasted sheets of paper. It is used for making cartons and signs, for example. (noun)
• Made of or consisting of cardboard. (adjective)
• Flimsy; insubstantial. (adjective)
• Lacking depth; superficial: a movie with only cardboard caricatures of its historical subjects. (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.

• "Barbara Olson, a passenger aboard the airliner doomed to be crashed into the Pentagon, was able to telephone her husband, Solicitor General Ted Olson; she told him that the hijackers were armed with knives and what she called a cardboard cutter ."
• "I followed and found the short, bearded lineman cursing at a cup of what I call cardboard coffee that had spilled over his fingers while he was trying to wrest it from the machine."
• "We have people living in cardboard boxes and starving to death and little kids crying out for homes and families and these people are worried about a housefly!!!!"