filling

noun

1. the act of one that fills
2. a thing used to fill something else or to supply what is lacking; specif.,
   1. the metal, plastic, etc. inserted by a dentist into a prepared cavity in a tooth
   2. the foodstuff used between the slices of a sandwich, in a pastry shell, etc.
3. ☆ the crosswise threads, or weft, in a woven fabric