from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One that interferes with the affairs of others, often for selfish reasons; a meddler.
  • n. One that intrudes in a place, situation, or activity: "When these interlopers choke out native species, ecologists see a danger signal” ( William K. Stevens).
  • n. Archaic One that trespasses on a trade monopoly, as by conducting unauthorized trade in an area designated to a chartered company.
  • n. Archaic A ship or other vessel used in such trade.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An unlicensed or illegitimate trader.
  • n. One who interferes, intrudes or gets involved where not welcome, particularly a self-interested intruder.

from the GNU version of the Collaborative International Dictionary of English

  • n. One who interlopes; one who unlawfully intrudes upon a property, a station, or an office; one who interferes wrongfully or officiously.

from The Century Dictionary and Cyclopedia

  • n. One who trades without license.
  • n. One who interferes obtrusively or officiously; one who thrusts himself into a station to which he has no claim, or into affairs in which he has no interest.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. someone who intrudes on the privacy or property of another without permission


inter- + probably Middle Dutch lōper, runner (from lōpen, to run).
(American Heritage® Dictionary of the English Language, Fourth Edition)
1590s, from inter- +‎ loper (“runner, rover”), as in landloper ("vagrant") (from Dutch) or lope ("to leap, to jump") (originally dialectical). Originally spelt enterloper and used in specific sense “unauthorized trader trespassing on privileges of chartered companies”, later general sense of “self-interested intruder” from 1630s. (Wiktionary)



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