interloper

About 0.19 uses per million words.

Meaning

1. noun One who interferes, intrudes, or gets involved where not welcome; particularly, a self-interested intruder. .mw-parser-output .defdate{font-size:smaller}

   They disliked the interloper, and forced him to leave.

2. noun An unlicensed or illegitimate trader.

Similar words

intruder trespasser interponent interferer obtruder intervenor meddler intermeddler officious intermeddler colonizer

Often followed by

in and who from was to is on had

Word family

interlopers