11th-commandment Definition
noun
Alternative form of 11th commandment.
Wiktionary
A well-known convention (often the most well-known of a certain field) which supposedly can not or should not be broken.
Wiktionary
Advertisement
Origin of 11th-commandment
-
In reference to the biblical Ten Commandments , carrying the implication that the convention is of very high importance (similar to the Ten Commandments).
From Wiktionary