noun 3.something inserted or to be inserted.
4.an extra leaf or section, printed independently, for binding or tipping into a book or periodical, especially a leaf or section consisting of an illustration or advertisement printed on different paper.
5.any small picture, device, etc., surrounded partly or completely by body type.
6.a paper, circular, etc., placed within the folds of a newspaper or the leaves of a book, periodical, etc.
7.Movies, Television. a cut-in.