A filler is something extra that adds bulk or weight to an object.
When people talk about fillers, they usually mean things like packaging materials, insulation, or even padding that's added to make an item more substantial. For example, a box might have fillers like peanuts or paper packing materials inside to keep it stable and safe during shipping. In construction, builders often use fillers like foam or fiberglass to help hold walls in place until they set. Even food products can contain fillers like added fiber or ingredients that make them appear more substantial.
How common is "filler"?
Word filler is considered rare in modern English. It appears most frequently in magazine texts and less often in other writings.
Definitions
noun
One who fills.
Something added to fill a space or add weight or size.
Any semisolid substance used to fill gaps, cracks or pores.
A relatively inert ingredient added to modify physical characteristics.
A short article in a newspaper or magazine.
A short piece of music or an announcement between radio or TV programmes.
Any spoken sound or word used to fill gaps in speech; filled pause.
Cut tobacco used to make up the body of a cigar.
In COBOL, the description of an unnamed part of a record that contains no data relevant to a given context (normally capitalised when in a data division).
A plant that lacks a distinctive shape and can fill inconvenient spaces around other plants in pots or gardens.
(usually in the plural) Any standing tree or standard higher than the surrounding coppice in the form of forest known as "coppice under standards".