Ullage meaning

ŭl'ĭj
The amount of liquid within a container that is lost, as by leakage, during shipment or storage.
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The amount by which a container, such as a bottle, cask, or tank, falls short of being full.
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The amount by which a container, esp. of liquid, falls short of being full.
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In a wine bottle, the empty space between the cork and the top of the wine.
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In a cask or barrel, the empty space, occupied by air, that is created by not completely filling the cask or barrel.
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The topping-up of such a barrel with fresh wine.
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In an industrial setting, the empty space in a tank, such as for fuel.
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Origin of ullage

  • Middle English ulage from Old French ouillage from ouiller to fill up a cask from ouil eye, bunghole from Latin oculus eye okw- in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Middle English ulage, from Anglo-Norman ullage, from *ullier (“to fill a partially empty cask"), from Old French oel (“bunghole", literally, "eye"), from Latin oculus (“eye").
    From Wiktionary