- reservoir - a large or extra supply of something; "a reservoir of talent"
--1 is a kind of supply
- reservoir, artificial lake - lake used to store water for community use
--2 is a kind of lake
--2 is a part of water system, water supply, water
--2 has particulars: Lake Mead- reservoir - tank used for collecting and storing a liquid (as water or oil)
--3 is a kind of tank, storage tank
--3 has particulars: cistern; sump; water tower- reservoir, source - anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies; "an infectious agent depends on a reservoir for its survival"
--4 is a kind of thing
- reservoir, artificial lake - lake used to store water for community use