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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. )

Explanation

If you intrude on people without their permission, you are an interloper. An interloper crashes parties and laughs at "No Trespassing" signs. Interloper was likely formed by combining inter-, ("between") with -loper, (from landloper, meaning "vagabond" or "adventurer"). An interloper, then, is someone who has ventured or traveled where he was not welcome. The noun interloper may also refer to something other than a person: "The new chain superstore built at the edge of town and was an interloper among the various mom-and-pop grocery stores in the area."

Keep Reading on Vocabulary.com

Vocabulary lists containing interloper

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.

Win or lose, streaming’s 900-pound gorilla will have thwarted or at least impeded a carefully laid attack by interloper David Ellison and his billionaire father, Larry.

From The Wall Street Journal • Dec. 9, 2025

From its display case in the museum’s “Stories from Mesoamerica” hall, the iridescent plumage shimmers like a rainbow encased in glass, a tropical interloper to these northern climes.

From Los Angeles Times • Oct. 24, 2025

The career interloper was on the cusp of becoming the establishment, if he wasn’t already.

From Slate • Sep. 10, 2025

The last time he played Glastonbury, in 2002, he was viewed as an interloper – sitting awkwardly on the bill beside the likes of The White Stripes, Coldplay and Orbital.

From BBC • Jun. 24, 2025

I’d been thinking of Wells as the interloper, busting in on my Mom brunch with his tiny ears and his Daughtry love.

From "Leah on the Offbeat" by Becky Albertalli