A state through which a river flows, or which has a river as a frontier or border; chiefly in plural referring to all the states connected in these ways to a particular river.
Origin
Mid 19th century; earliest use found in The Times.
Definition of river state in US English:
river state
noun
A state through which a river flows, or which has a river as a frontier or border; chiefly in plural referring to all the states connected in these ways to a particular river.
Origin
Mid 19th century; earliest use found in The Times.