1. an ancient manuscript book, especially of the Bible or other religious texts
Usage: historical
2. a systematic collection of laws or rules
Usage: formal

Examples

• The ancient codex contained beautifully illuminated pages of scripture.
• Scholars discovered a rare codex dating back to the fourth century.
• The monastery’s library housed several medieval codices.
• The legal codex outlined the procedures for civil disputes.
• Archaeologists found fragments of a papyrus codex in the ruins.
• The university acquired a Byzantine codex for its collection.