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Decorum is a Latin adjective meaning "proper", "according to accepted mores". It is found in the Latin phrase "Dulce et decorum est pro patria mori" (It is sweet and proper to die for one's country). In English it is used as a noun meaning "propriety" or "proper and accepted behaviour". E.g. "Sam showed a complete lack of decorum when he stood on the table and sang a song at the formal banquet."

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8y ago

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