The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         These words were very weakly inserted where they will
         be so liable to misconstruction.         --Bp.
                                                  Stillingfleet.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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