etiquette
eti|quette /'etɪket/
[N-UNCOUNT]
Etiquette is a set of customs and rules for polite behaviour, especially among a particular class of people or in a particular profession.
This was such a great breach of etiquette, he hardly knew what to do.
= protocol
[N-UNCOUNT]
Etiquette is a set of customs and rules for polite behaviour, especially among a particular class of people or in a particular profession.
This was such a great breach of etiquette, he hardly knew what to do.
= protocol