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To interfere in a harmful manner: tried to tamper with the decedent's will; tampering with the timing mechanism of the safe.
(verb-intransitive)
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To tinker with rashly or foolishly: Don't tamper with my feelings.
(verb-intransitive)
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To engage in improper or secret dealings, as in an effort to influence: tamper with a jury. See Synonyms at interfere.
(verb-intransitive)
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To alter improperly.
(verb-transitive)
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A neutron reflector in an atomic bomb that also delays the expansion of the exploding material, making possible a longer-lasting, more energetic, and more efficient explosion.
(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.