a. Something added to augment weight or size or fill space.

b. A composition, especially a semisolid that hardens on drying, used to fill pores, cracks, or holes in wood, plaster, or other construction surfaces before finishing.

c. Tobacco used to form the body of a cigar.

d. A short item used to fill space in a publication.

e. Something, such as a news item, public-service message, or music, used to fill time in a radio or television presentation.

f. A sheaf of loose papers used to fill a notebook or binder.

g. Architecture An element, such as a plate, used to fill the space between two supporting members.