A government commission responsible for managing a port's trade and transportation infrastructure, such as harbours, airports, tunnels and bridges; also in plural.
Origin
Mid 19th century; earliest use found in The Times.
Definition of port authority in US English:
port authority
noun
A government commission responsible for managing a port's trade and transportation infrastructure, such as harbours, airports, tunnels and bridges; also in plural.
Origin
Mid 19th century; earliest use found in The Times.