ullage

American  

[uhl-ij] / ˈʌl ɪdʒ /

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.

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ullage British  

/ ˈʌlɪdʒ /

noun

1. the volume by which a liquid container falls short of being full

2. 1. the quantity of liquid lost from a container due to leakage or evaporation

   2. (in customs terminology) the amount of liquid remaining in a container after such loss

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verb

1. to create ullage in

2. to determine the amount of ullage in

3. to fill up ullage in

Other Word Forms

• ullaged adjective

Etymology

Origin of ullage

First recorded in 1400–50; late Middle English ulage, oylage, from Anglo-French ulliage, from Old French ouillage, (h)eullage “wine needed to fill a cask,” equivalent to ouill(er), (a)ouill(er) “to fill (a cask)” (derivative of ouil “eye, hole, bunghole,” from Latin oculus ) + -age; see origin at eye ( def. ), -age

Example Sentences

These Proton upper-stage ullage motors are known as SOZ motors, and there are currently 64 of them in Earth orbit, McDowell tweeted.

From Scientific American • May 5, 2022

All air is carefully excluded from the casks, any ullage is immediately checked, and as evaporation is continually going on the casks 83 are examined every fortnight, when any deficiency is at once replenished.

From Facts About Champagne and Other Sparkling Wines by Vizetelly, Henry