filling

noun

1. any material that fills a space or container"there was not enough fill for the trench"
2. flow into something (as a container)
3. a food mixture used to fill pastry or sandwiches etc.
4. the yarn woven across the warp yarn in weaving
5. (dentistry) a dental appliance consisting of any of various substances (as metal or plastic) inserted into a prepared cavity in a tooth"when he yawned I could see the gold fillings in his teeth"
6. the act of filling something