Source : Webster's Revised Unabridged Dictionary (1913)

Insert \In*sert"\, v. t. [imp. & p. p. {Inserted}; p. pr. & vb.
   n. {Inserting}.] [L. insertus, p. p. of inserere to insert;
   pref. in- in + serere to join, connect. See {Series}.]
   To set within something; to put or thrust in; to introduce;
   to cause to enter, or be included, or contained; as, to
   insert a scion in a stock; to insert a letter, word, or
   passage in a composition; to insert an advertisement in a
   newspaper.

         These words were very weakly inserted where they will
         be so liable to misconstruction.         --Bp.
                                                  Stillingfleet.

Source : WordNet®

insert
     n 1: a folded section placed between the leaves of another
          publication
     2: an artifact that is inserted or is to be inserted [syn: {inset}]
     3: (broadcasting) a local announcement inserted into a network
        program [syn: {cut-in}]
     4: (film) a still picture that is inserted and that interrupts
        the action of a film [syn: {cut-in}]
     v 1: put or introduce into something; "insert a picture into the
          text" [syn: {infix}, {enter}, {introduce}]
     2: introduce; "Insert your ticket here" [syn: {enclose}, {inclose},
         {stick in}, {put in}, {introduce}]
     3: fit snugly into; "insert your ticket into the slot"; "tuck
        your shirtail in" [syn: {tuck}]
     4: insert casually; "She slipped in a reference to her own
        work" [syn: {slip in}, {stick in}, {sneak in}]