Nefastus
Defined in 4 dictionaries — Black's (1910), Kinney (1893), Black's (1891), Abbott (1879)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A Law Dictionary and Glossary
George C. Kinney · 1893
I.
In the Roman law. Profane, non-juridical, — applied to days on which it was unlawful to administer justice.
A Dictionary of Law
Henry Campbell Black · 1891
Lat. Inauspicious. Applied, in the Roman law, to a day on which it was unlawful to open the courts or administer justice. Negatio conclusionis ost error in lege. Wing. 268. The denial of a conclusion ig error in law. Negatio destruit negationem, et ambe faciunt affirmationem. A negative destroys a negative, and both make an affirmative. Co. Litt. 1466. Lord Coke cites this as a rule of grammatical construction, not always applying in law. Negatio duplex est affirmatio A double negative is an affirmative.
Dictionary of Terms and Phrases Used in American or English Jurisprudence
Benjamin Vaughan Abbott · 1879
Inauspicious. Applied, in the Roman law, to a day on which it was unlawful to administer Negatio conclusiouis est error in lege. Denial of a conclusion is error in law. To deny a conclusion of law is bad pleading. Denials must be of facts; not merely of legal conclusions drawn as inferences from facts alleged and not denied.