( used with a singular or plural verb ) a complete system of reservoirs, pipelines, conduits, etc., by which water is collected, purified, stored, and pumped to urban users.

( used with a singular verb ) a pumping station or a purifying station of such a system.

( usually used with a plural verb ) Sometimes, waterwork. a spectacular display of water, mechanically produced, as for a pageant.

( used with a singular or plural verb ) Slang . tears, or the source of tears

to turn on the waterworks.

Slang . the kidneys.