waterworks

noun, plural wa·ter·works.

1. (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.
2. (used with a singular verb) a pumping station or a purifying station of such a system.
3. (usually used with a plural verb) Sometimes waterwork. a spectacular display of water, mechanically produced, as for a pageant.
4. (used with a singular or plural verb) Slang. tears, or the source of tears: to turn on the waterworks.
5. Slang. the kidneys.