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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."

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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.

Yet O’Connor condemned RIH’s move as an underhanded gambit to “circumvent” his authority, as though he alone had a claim to litigate this dispute and McElroy was an impudent interloper.

From Slate • May 19, 2026

A dramatic scene unfolded Sunday at Hansen Dam Recreation Area, in the San Fernando Valley near Pacoima, as an ursine interloper came too close for comfort to weekend crowds at the park.

From Los Angeles Times • May 4, 2026

As in “The Country of the Pointed Firs,” the novel is about the arrival of a worldly interloper to a remote, pastoral community.

From The Wall Street Journal • Mar. 26, 2026

It wasn’t long ago that the thought of even a single interloper breaking into the ultraexclusive championship club seemed about as far-fetched as Nick Saban taking up stand-up comedy.

From The Wall Street Journal • Jan. 2, 2026

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

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