tun

noun

• 1a large beer or wine cask.
• a brewer’s fermenting vat.

• 2an imperial measure of capacity, equal to 4 hogsheads.

• 3 (also tun shell) a large marine mollusk that has a rounded barrellike shell with broad spirals.

  • Family Tonnidae, class Gastropoda

verb (tuns, tunning, tunned)

• store (wine or other alcoholic drinks) in a tun.