Home › Words › R › reservatoryreservatoryreservatory means reserving something.Among words judged in Lexicurio's Arena, reservatory ranks #1,471 of 42,762 for Qualifying.EtymologyFrom Latin reservatorium, from resservare. See reserve and compare reservoir.adjreserving somethinge.g.“a reservatory clause”nounA place in which things are reserved or kept.e.g.“I got such Notice of that subterranean Reservatory as to enable me to make a Computation of the Quantity of Water” — 1695, John Woodward, “(please specify the page)”, in An Essay toward a Natural History of the Earth: And Terrestrial Bodies, Especially Minerals: […], London: […] Ric[hard] Wilkin […], →OCLC:Definitions & examples from Wiktionary (CC BY-SA 3.0).