Frank-pledge
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In old English law
A pledge or surety for freemen; that is, the pledge, or corporate responsibility, of all the inhabitants of a tithing for the general good behavior of each free-born citizen above the age of fourteen, and for his being forthcoming to answer any infraction of the law. Termes de la Ley ; Cowell.