Source : Webster's Revised Unabridged Dictionary (1913)

Obtrude \Ob*trude"\, v. i.
   To thrust one's self upon a company or upon attention; to
   intrude.

   Syn: To {Obtrude}, {Intrude}.

   Usage: To intrude is to thrust one's self into a place,
          society, etc., without right, or uninvited; to obtrude
          is to force one's self, remarks, opinions, etc., into
          society or upon persons with whom one has no such
          intimacy as to justify such boldness.

Obtrude \Ob*trude"\, v. t. [imp. & p. p. {Obtruded}, p. pr. &
   vb. n. {Obtruding}.] [L. obtrudere, obtrusum; ob (see {Ob-})
   + trudere to thrust. See {Threat}.]
   1. To thrust impertinently; to present without warrant or
      solicitation; as, to obtrude one's self upon a company.

            The objects of our senses obtrude their particular
            ideas upon our minds, whether we will or no. --Lock.

   2. To offer with unreasonable importunity; to urge unduly or
      against the will. --Milton.

Source : WordNet®

obtrude
     v 1: push to thrust outward [syn: {push out}, {thrust out}]
     2: thrust oneself in as if by force; "The colors don't intrude
        on the viewer" [syn: {intrude}]