Main Entry:

ul·lage

Pronunciation:

\ˈə-lij\

Function:

noun

Etymology:

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

Date:

15th century

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