Толковый словарь английского языка - filler

I. noun Date: 15th century one that fills: as, a substance added to a product (as to increase bulk, weight, viscosity, opacity, or strength), a composition used to fill the pores and grain especially of a wood surface before painting or varnishing, a piece used to cover or fill in a space between two parts of a structure, tobacco used to form the core of a cigar, material used to fill extra space in a column or page of a newspaper or magazine or to increase the size of a work (as a book), a pack of paper for a loose-leaf notebook, a sound, word, or phrase (as “you know?”) used to fill pauses in speaking, II. noun (plural ~s or ~) Etymology: Hungarian fillér Date: 1904 see: money