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Webster 1913 Edition

(rē̍-bŭt′tal)

Noun.

(Law)

The giving of evidence on the part of a plaintiff to destroy the effect of evidence introduced by the defendant in the same suit.

rebuttal ‎(plural rebuttals)

The act of refuting something by making a contrary argument, or presenting contrary evidence.
A statement, designed to refute or negate specific arguments put forward by opponents.
(law) A pleading by a defendant in reply to the evidence put forward by a plaintiff or the prosecution.