Definition of roper river in English English dictionary
River, Northern Territory, Australia. It flows east to Limmen Bight on the Gulf of Carpentaria; it is about 325 mi (525 km) long and is navigable for about 90 mi (145 km). It marks the southern limit of the region known as Arnhem Land. North of the river's mouth is the "Ruined City of Arnhem Land," a region of sandstone whose weathered shapes suggest ruined buildings