Ipso jure
Defined in 3 dictionaries — Ballentine's (1916), Black's (1910), Black's (1891)
Ballentine's Law Dictionary
James A. Ballentine · 1916
By the law itself.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
By the law itself; by the mere operation of law. Calvin.
A Dictionary of Law
Henry Campbell Black · 1891
By the law itself; by the mere operation of law. Calvin, Ira furor brevis est. Anger is a short insanity. 4 Wend. 336, 355.