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Words or signs having no intelligible meaning: a message that was nonsense until decoded.
(noun)
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Subject matter, behavior, or language that is foolish or absurd.
(noun)
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Extravagant foolishness or frivolity: a clown's exuberant nonsense.
(noun)
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Matter of little or no importance or usefulness: a chatty letter full of gossip and nonsense.
(noun)
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Insolent talk or behavior; impudence: wouldn't take any nonsense from the children.
(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.