convention -
something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors"
practice a customary way of operation or behavior; "it is their practice to give annual raises"; "they changed their dietary pattern"
mores (sociology) the conventions that embody the fundamental values of a group
code of behavior,
code of conduct a set of conventional principles and expectations that are considered binding on any person who is a member of a particular group
convention -
(diplomacy) an international agreement
conventional following accepted customs and proprieties; "conventional wisdom"; "she had strayed from the path of conventional behavior"; "conventional forms of address"
unconventional not conforming to accepted rules or standards; "her unconventional dress and hair style"
orthodoxy the quality of being orthodox (especially in religion)