"noble, splendid," c.1385, from
state (n.1) in a sense of "costly and imposing display" (such as benefits a person of rank and wealth), c.1330; a sense also preserved in the phrase to
lie in state "to be ceremoniously exposed to view before interment" (1705). Hence also
stateroom (1703), reserved for ceremonial occasions; earlier (1660) it meant "a captain's cabin."