The term you’re looking for is ullage—the amount by which a liquid container falls short of being full. This can refer to the space left in a container or the volume of liquid that would need to be added to reach full capacity, depending on the context. If you want a precise definition tailored to a specific domain (e.g., wine casks, fuel tanks, or general packaging), I can provide a more exact wording. Key points:
- Ullage describes both the empty space in a container and the shortfall from full capacity.
- It is commonly used in logistics, beverage, and petroleum industries to quantify how much more liquid can be added or how much has been lost.
- In everyday language, people may use phrases like "half-full" or "the container is ullaged by X liters" depending on whether they refer to the space or the shortfall.
If you’d like, I can format this with precise definitions or provide examples across different container types.
