Also 7–8 -er. [a. L. contrādictor, agent-n. from contrādīcĕre to CONTRADICT; the variant in -er is formed on the English verb.] One who contradicts; one who speaks against, opposes, or denies what is asserted, claimed, proposed, etc.; a gainsayer.

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1599–1623.  Minsheu, Sp. Dict., Contradezidor, a gainesayer, a contradictor.

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1612.  T. Taylor, Comm. Titus i. 9. Stubborne and opposite contradictors of the truth.

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1645.  Milton, Tetrach. (1851), 207. In hope to find him a contradicter of Moses, and a condemner of Herod.

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1727.  Swift, State Irel., Wks. 1755, V. II. 161. If a gentleman happen to be a little more sincere … he is sure to have a dozen contradictors.

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1825.  Ld. Cockburn, Mem., 228. It is easy to make almost any hypothesis have an appearance of soundness when there is no contradictor.

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1889.  Ld. Watson, in Law Rep., 14 App. Cases 668. Re-trying … the same issues which have already been conclusively decided against him in a question with his proper contradictor.

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