Dictionary.com
Thesaurus.com
Synonyms

interloper

American  
[in-ter-loh-per] / ˈɪn tərˌloʊ pər /

noun

  1. a person who interferes or meddles in the affairs of others.

    He was an atheist who felt like an interloper in this religious gathering.

  2. an intruder; trespasser.

  3. a person who intrudes into some region or field of trade without a proper license.


interloper British  
/ ˈɪntəˌləʊpə /

noun

  1. an intruder

  2. a person who introduces himself into professional or social circles where he does not belong

  3. a person who interferes in matters that are not his concern

  4. a person who trades unlawfully

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of interloper

First recorded in 1585–95; inter- + lope + -er 1 ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Mr. B. eventually moved on and the interloper, dubbed Shadow, moved in.

From Los Angeles Times

The interloper came from an unlikely place: Ohio.

From The Wall Street Journal

A pair of new books, though, suggest that the overall shift was only so modest, ultimately shoring up not just the old-school studio system but the social norms the interlopers were supposed to be upending.

From Los Angeles Times

“Children, get away from the interloper. This doesn’t concern you.”

From Literature

The Nomole know neither metal nor wheels but can kill interlopers from an astounding distance without warning.

From The Wall Street Journal