Definition of run-of-river in English:

run-of-river

adjective

  • Of a water supply: taken directly from a river with no significant attempt to store water or regulate flow; (of a hydroelectric power plant) making use of such a water supply; of or relating to such a water supply or power plant.

Origin

Early 20th century. From run + of + river.

Pronunciation

run-of-river

/ˌrʌnəvˈrɪvə/