1. The quantity of liquid contained in a cask or barrel, measured by the depth of the liquid inside.
Usage: chiefly British; commercial/trade term; opposite of ullage

Examples

• The innage of the wine barrel was measured to determine the exact volume of liquid remaining.
• Merchants calculated the innage to assess the value of the shipment.
• The inspector recorded the innage of each cask before sealing it.
• Proper innage measurement is essential for accurate inventory in the brewery.