decorum
UK: dɪˈkɔːrəm | US: dɪˈkɔːrəm
n. proper and polite behavior suitable to a formal or social occasion
n. adherence to conventional standards of conduct or taste
Derived from Latin decorum (propriety, seemliness), the word originally referred to the aesthetic and behavioral ideals of classical antiquity. It evolved in English (16th century) to emphasize social propriety, reflecting the Renaissance revival of classical virtues. The root decor ties to grace and dignity, while the suffix -um solidifies it as a concept of collective norms.
The diplomat maintained perfect decorum during the tense negotiations.
Students are expected to observe decorum in academic ceremonies.
Her speech lacked decorum, offending the conservative audience.
The judge insisted on strict decorum in the courtroom.
Victorian society placed high value on outward decorum.