Definition of "obtruder" [ob•trud•er]

• One who obtrudes. (noun)

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• "– I have not been a treacherous listener, though a wilful obtruder – See, Mrs. Tyrold!"
• "Several molluscs admit tenants, one particular species a rotund crab; but in the case in point the wrong mansion was entered and, so to speak, the obtruder was transformed."
• "It is a startling announcement of a fateful fact, an obtruder feared and unloved; it is like a clash of cymbals or call of trumpets summoning to unwelcome tasks, away from delights and dreams."