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To make slender, fine, or small: The drought attenuated the river to a narrow channel.
(verb-transitive)
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To reduce in force, value, amount, or degree; weaken: Medicine attenuated the fever's effect.
(verb-transitive)
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To lessen the density of; rarefy.
(verb-transitive)
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Biology To make (bacteria or viruses) less virulent.
(verb-transitive)
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Electronics To reduce (the amplitude of an electrical signal) with little or no distortion.
(verb-transitive)
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.