de·co·rum 
/dɪˈkorəm/ noun
/dɪˈkorəm/ noun [noncount] formal : correct or proper behavior that shows respect and good manners
▪ He has no sense of decorum. ▪ Court decorum [=proper behavior in a courtroom] requires that all parties address the judge as “Your Honor.”
▪ He has no sense of decorum. ▪ Court decorum [=proper behavior in a courtroom] requires that all parties address the judge as “Your Honor.”
