[L., summum (see SUMMUM BONUM), jūs right, law.] The utmost rigor of the law, extreme severity.

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1588.  J. Udall, Diotrephes (Arb.), 29. Summum ius, must be your best help in this case.

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1609.  J. Davies, Humour’s Heaven, I. ccxii. To rule them with the Rod of Summumius.

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1668.  Wilkins, Real Char., II. viii. § 3. 207. Summum Jus, Rigidness, sourness, unreasonableness, iniquity.

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1692.  T. Watson, Body Divin., 50. God doth not go according to the summum jus, or rigour of the Law.

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1774.  Burke, Corr. (1844), I. 485. The strict letter and summum jus of decorum and propriety.

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