What is the meaning of Ullage?
In a wine bottle, the empty space between the cork and the top of the wine.
In a cask or barrel, the empty space, occupied by air, that is created by not completely filling the cask or barrel, or through spillage.
The topping-up of such a barrel with fresh wine.
In an industrial setting, the empty space in a tank, especially as for fuel.
Additional cargo of little or no value taken on to prevent movement of shifting of the purposive cargo.
Left-over wine surreptiously drunk by waiters as they clear away the glasses.
To gauge the amount of empty space between the top of a cask and the level of liquid inside it.
Source: wiktionary.orgSearch words containing