Si prius
Defined in 3 dictionaries — Ballentine's (1916), Bouvier (1914), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
If before.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
If before. Formal words in ancient writs for summoning juries. Fleta, 1. 2, c. 65, § 12. SI TE FECERIT SECURUM (Lat If he make you secure). Words which occur in the form of writs, which originally required, his claim, before the sheriff can be required to execute such writ.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat.
In old practice. If before. Formal words in the old writs for summoning juries. Fleta, 1. 2, c. 65, § 12.