filling
n. C / Un. the food or material put inside something else. You usually hear this when talking about what is inside a sandwich, a pie, or even a tooth that a dentist fixed.
n. a quantity of edible or functional material used to occupy a cavity or space within another object. Often refers to the contents of a pastry or the restorative material used by a dentist to repair a tooth.
The chocolate filling in this cake is delicious.
The dentist told me that my old silver filling needs to be replaced with a white one.
While the pastry crust was perfectly flaky, the savory mushroom filling lacked the seasoning required to balance the richness of the butter.
Countable when referring to a specific dental repair or a variety of food; uncountable when referring to the substance in bulk.