behavior in keeping with good taste and propriety: you exhibit remarkable modesty and decorum.
• etiquette: he had no idea of funeral decorum.
• (usu. decorums) archaic a particular requirement of good taste and propriety.
• archaic suitability to the requirements of a person, rank, or occasion.
ORIGIN mid 16th cent. (as a literary term, denoting suitability of style): from Latin, neuter of the adjective decorus ‘seemly.’