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Word of the Day
Wednesday, November 10, 2010

Definitions for ullage

  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. In 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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Citations for ullage
But the whisky, of which they had drunk a considerable quantity judging by the ullage in the bottle that stood between them on the cabin table, had loosened Wyatt's tongue and exposed his innermost preoccupations. Richard Woodman, The Darkening Sea
Men, like himself, sapped skeletal by ill-health, the ullage of all that was vital. John Lawton, A Little White Death
Origin of ullage
late Middle English
The ultimate source of ullage is the French ouil, "eye or hole," which comes from combination of the Latin oculus, "eye" and the suffix -age, designating an abstract condition.