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Well-rounded and full in form; chubby. See Synonyms at fat.
(adjective)
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Abundant; ample: a plump reward.
(adjective)
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To make well-rounded or full in form: plumped up the pillows.
(verb-transitive)
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To become well-rounded, chubby, or full in form: The baby plumped out at three months.
(verb-intransitive)
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To drop abruptly or heavily: plumped into the easy chair.
(verb-intransitive)
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.