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.
any small picture, device, etc., surrounded partly or completely by body type.
a paper, circular, etc., placed within the folds of a newspaper or the leaves of a book, periodical, etc.
Movies, Television. a cut-in.
1520-30; < Latininsertus past participle of inserere to put in, insert, equivalent to in-in-2 + ser- (stem of serere to link together) + -tus past participle suffix