[ad. L. assevērātiōn-em, n. of action f. assevērāre: see ASSEVER and -ATION. Cf. It. asseueratione (Florio, 1611).]

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  1.  The action of asseverating; solemn affirmation, emphatic assertion, positive declaration, avouchment.

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1564.  Brief Exam., ****** ij b. You so confidently bare the matter downe with your vndoubted asseueration.

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1605.  Bacon, Adv. Learn., I. 26. Men ought … to propound things sincerely, with more or lesse asseueration, as they stand in a man’s own iudgement, prooued more or lesse.

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1781.  Cowper, Convers., 59. Asseveration blustering in your face, Makes contradiction such a hopeless case.

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  2.  That which is asseverated; a solemn or emphatic declaration or assertion.

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a. 1556.  Cranmer, Wks., I. 67. Such abominable and beastly asseverations as you never heard.

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1658.  T. Wall, God’s Revenge, 25. The wise man’s constant asseveration, by pride only cometh contention.

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1753.  Smollett, Ct. Fathom (1784), 152/2. Incensed at this asseveration, which he was not prepared to refute.

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1855.  Macaulay, Hist. Eng., IV. 520. In spite of the solemn asseverations of his wife and his servants.

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  3.  Emphatic confirmation of a statement; a word or phrase used to express confirmation; an oath.

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1602.  T. Fitzherb., Apol., 11 a. I do first make the same asseueration as before vpon my Saluation.

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1644.  Bulwer, Chiron., 57. Both Hands smitten together … doth affirme with Rhetoricall asseveration.

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a. 1675.  Sterry, Freed. Will, 167. It is brought … with a twofold Asseveration; ‘Yea, even.’

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1841.  Dickens, Barn. Rudge (C. D. ed.), 146. The sergeant rejoined with many choice asseverations that he didn’t.

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