RhymeZone: tundish definitions

Definitions of tundish:

noun: A kind of funnel used in brewing fitting into the bung-hole of a tun or cask.
noun: A funnel used in smelting, foundry work etc.
noun: A funnel used to create a siphonic break in a drainage system and/or provide visual indication of flow, usually in an overflow line.

(Definitions from Wiktionary)