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Destructively or frenetically violent: a berserk worker who started smashing all the windows.
(adjective)
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Mentally or emotionally upset; deranged: berserk with grief.
(adjective)
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Informal Unrestrained, as with enthusiasm or appetite; wild: berserk over chocolates.
(adjective)
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One that is violent, upset, or unrestrained.
(noun)
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A berserker.
(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.