interloper

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

noun

a person who interferes or meddles in the affairs of others: He was an athiest who felt like an interloper in this religious gathering.
a person who intrudes into a region, field, or trade without a proper license.

Origin of interloper

1585–95;inter- + -loper (see landloper)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for interloper

British Dictionary definitions for interloper

interloper

/ (ˈɪntəˌləʊpə) /

noun

an intruder
a person who introduces himself into professional or social circles where he does not belong
a person who interferes in matters that are not his concern
a person who trades unlawfully

Word Origin for interloper

C17: from inter- + loper, from Middle Dutch loopen to leap
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