Liczba mnoga: ullages

ETYM Old Fren. eullage, ovillage, the filling up of a cask, from ouillier, oillier, euillier, to fill a wine cask; properly, to add oil to prevent evaporation, as to a flask that is nearly full, from Old Fren. oile oil. Related to Oil.
The amount that a container (as a wine bottle or tank) lacks of being full.
Quantity by which vessel is under full capacity.
Lack; deficiency; amount by which a quantity, especially of liquor, is short of full measure; dregs.

Not full measure.

Singular of ullages is ullage.