PRECEDENCE

'Precedence' is a simple ordering, based on either importance or sequence; it may refer to one of the following:

★ Message precedence of military communications traffic

★ Order of precedence, the ceremonial hierarchy within a nation or state

★ Order of operations in mathematics

★ Precedence Entertainment, a defunct publisher of several collectible card games.
'Precedent' in law is a legal case establishing a principle to be adhered to in subsequent rulings.