Firmitas
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Lat. [from firmus, firm, sure.] In old European law. An assurance; a deed or charter confirmed by witnesses or seal, for assuring some privilege.
Spelman.
Capitular. lib.
4, c. 37.
L. Alaman. tit. 1, § 1, cited ibid.