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.(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
4.a food mixture used to fill pastry or sandwiches etc.
5.the yarn woven across the warp yarn in weaving
6.the act of filling something