Home › Words › P › pondagepondagepondage means the small water storage behind the weir of a run-of-the-river hydroelectric power plant.Among words judged in Lexicurio's Arena, pondage ranks #1,199 of 42,752 for Qualifying.EtymologyFrom pond + -age.nounThe small water storage behind the weir of a run-of-the-river hydroelectric power plant.The water in a reservoir.Definitions & examples from Wiktionary (CC BY-SA 3.0).