RhymeZone: frankpledge definitions

Definitions of frankpledge:

noun: (law, historical) A form of collective suretyship and punishment under English law among the members of a tithing.
noun: Any group so similarly answerable for the conduct of all its members and liable for collective punishment.
noun: (law, historical) A decener: a member of a tithing bound in frankpledge.
noun: (law, historical, uncommon) The tithing itself.

(Definitions from Wiktionary)