ETIQUETTE
etiquette
(noun) rules governing socially acceptable behavior
Source: WordNet® 3.1
Etymology
Noun
etiquette (countable and uncountable, plural etiquettes)
The forms required by a good upbringing, or prescribed by authority, to be observed in social or official life; observance of the proprieties of rank and occasion; conventional decorum; ceremonial code of polite society.
The customary behavior of members of a profession, business, law, or sports team towards each other.
A label used to indicate that a letter is to be sent by airmail.
Source: Wiktionary
Et"i*quette`, n. Etym: [F. prop., a little piece of paper, or a mark
or title, affixed to a bag or bundle, expressing its contents, a
label, ticket, OF.estiquete, of German origin; cf. LG. stikke peg,
pin, tack, stikken to stick, G. stecken. See Stick, and cf. Ticket.]
Definition: The forms required by good breeding, or prescribed by
authority, to be observed in social or official life; observance of
the proprieties of rank and occasion; conventional decorum;
ceremonial code of polite society.
The pompous etiquette to the court of Louis the Fourteenth. Prescott.
Source: Webster’s Unabridged Dictionary 1913 Edition