Literally, a volume or roll. It is particularly applied to the volume of the civil law, collected by the emperor Justinian, from all pleas and answers of the ancient lawyers, which were in loose scrolls or sheets of parchment. These he compiled into a book which goes by the name of Codex.
Law Dictionary – Alternative Legal Definition
A code or collection of laws; particularly the Code of Justinian. Also a roll or volume, and a book written on paper or parchment Codex Gregorianns. A collection of imperial constitutions made by Gregorius, a Roman jurist of the fifth century, about the middle of the century. It contained the constitutions from Hadrian down to Constantine. Mackeld. Rom. Law,