Translation of "arau" into English

An established standard, guide, or regulation. A principle or regulation set up by authority, prescribing or directing action or forbearance; as the rules of a legislative body, of a company, court, public office, of the law, of ethics. (Source: WESTS)

regulating principle of humans, including laws, instructions, guidelines, social conventions [..]

Something considered by an authority or by general consent as a basis of comparison.