Found 2 items, similar to ullage.
English → English (WordNet) Definition: ullage ullage n : the amount that a container (as a wine bottle or tank) lacks of being full
English → English (gcide) Definition: Ullage Ullage \Ul"lage\ (?; 48), n. [OF. eullage, ovillage, the filling up of a cask, fr. ouillier, oillier, euillier, to fill a wine cask; properly, to add oil to prevent evaporation, as to a flask that is nearly full, fr. OF. oile oil. See Oil.] (Com.) The amount which a vessel, as a cask, of liquor lacks of being full; wantage; deficiency. [1913 Webster]