The amount that a container (as a wine bottle or tank) lacks of being full.

Roget 190: contents; cargo, lading, freight, shipment, load, bale, burden, jag; cartload^†, shipload; cup of, basket of, etc. (receptacle) 191 of; inside etc. 221; stuffing, ullage.    ... meer laten zien

Nederlands: wan
Pools: ubytek