Ullage
noun
1.
the amount by which the contents fall short of filling a container, as a cask or bottle.
2.
the quantity of wine, liquor, or the like, remaining in a container that has lost part of its contents by evaporation, leakage, or use.
3.
Rocketry. the volume of a loaded tank of liquid propellant in excess of the volume of the propellant; the space provided for thermal expansion of the propellant and the accumulation of gases evolved from it.
noun
1.
the volume by which a liquid container falls short of being full
2.
the quantity of liquid lost from a container due to leakage or evaporation
(in customs terminology) the amount of liquid remaining in a container after such loss
verb (transitive)
3.
to create ullage in
4.
to determine the amount of ullage in
5.
to fill up ullage in
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