noun ul·lage \ˈə-lij\

Definition of ullage

  1. :  the amount that a container (as a tank or cask) lacks of being full

Origin and Etymology of ullage

Middle English ulage, from Anglo-French ulliage, from *ullier to fill a partially empty cask, from Old French (Picard dialect) oel bunghȯle, literally, eye, from Latin oculus eye — more at eye

First Known Use: 15th century

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