The meaning of TUN is a large cask especially for wine.

The word tun is etymologically related to the word ton for the unit of mass, the mass of a tun of wine being approximately one long ton, which is 2 240 pounds (1 016 kg).

Dec 10, 2012 · tun (plural tuns or tunob) A part of the ancient Maya Long Count Calendar system which corresponds to 18 winal cycles or 360 days.

Under extreme conditions, tardigrades may engage in cryptobiosis, a process in which they may become completely dehydrated and roll up into a little ball called a "tun."

The Heidelberg Tun is a huge wine barrel in the cellar of Heidelberg castle. It holds 58,000 gallons. The word tun echoes in our language as the T-O-N, ton -- no longer a unit of volume, but of weight. That's …

1. a large cask for holding liquids, esp. wine, ale, or beer. 2. a measure of liquid capacity, usu. equivalent to 252 gallons. 3. to put into or store in a tun or tuns.

The name tun refers to the snails' shell shape which resembles wine casks known as tuns.

tun (tun), n., v., tunned, tun•ning. n. a large cask for holding liquids, esp. wine, ale, or beer. Weights and Measures a measure of liquid capacity, usually equivalent to 252 wine gallons. v.t. to put into or store …

There are 12 meanings listed in OED's entry for the noun tun, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Later the village was surrounded by a wall called a tun, and by a transfer of terms the village frequently came to be called a mark, or tun, later changed to town.