What word commonly refers to the headspace of air between wine and the top of the container holding the wine?

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Player #25874027, It is. You're quite right.

1. The amount by which a container falls short of being full. 2. Loss of liquid, by evaporation or leakage.” Term is also commonly used in freight, especially with respect to the carriage of liquids.

I thought ullage is the waste from draught beer