Filling
Pronunciation : Fill"ing
Part of Speech : n.
Definition : 1. That which is used to fill a cavity or any empty space, or to supply a deficiency; as, filling for a cavity in a tooth, a depression in a roadbed, the space between exterior and interior walls of masonry, the pores of open-grained wood, the space between the outer and inner planks of a vessel, etc.
2. The woof in woven fabrics.
3. (Brewing)
Defn: Prepared wort added to ale to cleanse it. Back filling. (Arch.) See under Back, a.
Source : Webster's Unabridged Dictionary, 1913