Webster 1913 Edition
To thrust one’s self upon a company or upon attention; to intrude.
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.
Webster 1828 Edition
1.To thrust in or on; to throw, crowd or thrust into any place or state by force or imposition, or without solicitation. Men obtrude their vain speculations upon the world.
A cause of common error is the credulity of men, that is, an easy assent to what is obtruded.
The objects of our senses obtrude their particular ideas upon our minds, whether we will or not.
2.To offer with unreasonable importunity; to urge upon against the will.
Why shouldst thou then obtrude this diligence in vain, where no acceptance it can find?
To obtrude one's self, to enter a place where one is not desired; to thrust one's self in uninvited, or against the will of the company.