Anything that is used to fill something.
A religious experience attributed to the Holy Ghost "filling" a believer.
The woof in woven fabrics.
The contents of a pie, etc.
Any material used to fill a cavity in a tooth or the result of using such material.
Prepared wort added to ale to cleanse it.
Of food, that satisfies the appetite by filling the stomach.
A new supply of something.
The act of replenishing.