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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.

Interloper casually picking up a discarded program: “I’m second-acting. What’d I miss?”

From Washington Post • Jul. 7, 2017

According to Peter Savodnik, whose book The Interloper about Oswald's Minsk years was published earlier this month, he said he had secret details about the US's prized U-2 spy plane.

From BBC • Nov. 19, 2013

Last week Interloper Schlamme extended her welcome trespass by turning up in a Bowery theater-caf� called The Howff with a show devoted entirely to Weill.

From Time Magazine Archive

"Some for the Glories of this world; and some Sigh for the Prophet's Paradise to Come;" The greatest Boon I ask for is, I may Supplant this Interloper as a Chum.

From The Rubaiyat of a Huffy Husband by Little, Mary Wallace Bundy

Interloper, in-tėr-lōp′ėr, n. one who trades without license: an intruder.—v.i. and v.t.

From Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) by Various