Jack
Defined in 2 dictionaries — Black's (1910), Black's (1891)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A kind of defensive coat-armor worn by horsemen in war; not made of solid iron, but of many plates fastened together. Some tenants were bound by their tenure to find it upon invasion. Cowell.
A Dictionary of Law
Henry Campbell Black · 1891
<A kind of defensive coat-armor by throwing down one of the stones of tie worn by horsemen in war; not made of solid building befure witnessea called for the fron, but of many plates fastened together, Tray. Lat. Max. purpose. Some tenants were bound by their tenure to find ib upon invasion. Cowell. ee JAIL. A gaol; a prison; a building designated by law, or regularly used, for the