# Surprise Song of the Day!
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Proper and polite behavior. decorum Decorum is proper and polite behavior. If you let out a big belch at a fancy dinner party, you’re not showing much decorum. This noun is from Latin decōrus “proper, becoming, handsome,” from décor “beauty, grace,” which is also the source of English décor. The corresponding adjective is decorous, meaning “well-behaved in a particular…