noun (n)

• any material that fills a space or container(noun.substance)

  Synonym:
  fill
  

  source: wordnet30
• flow into something (as a container)(noun.process)

  source: wordnet30
• a food mixture used to fill pastry or sandwiches etc.(noun.food)

  source: wordnet30
• the yarn woven across the warp yarn in weaving(noun.artifact)

  Synonym:
  pick, weft, woof
  

  source: wordnet30
• (dentistry) a dental appliance consisting of any of various substances (as metal or plastic) inserted into a prepared cavity in a tooth(noun.artifact)

  Example:
  When he yawned I could see the gold fillings in his teeth.
  An informal British term for `filling' is `stopping'.
  

  source: wordnet30
• the act of filling something(noun.act)

  source: wordnet30
• 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.(noun)

  source: webster1913