Definition of Decalogue as the Ten Commandments in real context for English learners as a historical term related to theology
/dekalɔg/ (noun)
Definition
the Ten Commandments or 10 rules revealed to Moses from God according to which humans are obliged to act in response to other humans and God, teaching, principle, precept, guideline, dictum, instruction
Example
Ten Commandments, also called Decalogue, which means “10 words”, list of religious precepts or principles that were divinely revealed to Moses on Mount Sinai and were engraved on two tablets of stone. The Commandments are recorded virtually identical and give humans 10 rules or commands in the realm of morality and codes of ethics.
Source: https://www.britannica.com/