Interloper
Pronunciation : In"ter*lo`per
Part of Speech : n.
Etymology : [Pref. inter- + D. looper a runner, fr. loopen to run; akin to E. leap. See Leap, and cf. Elope.]
Definition : Defn: One who interlopes; one who interlopes; one who unlawfully intrudes upon a property, a station, or an office; one who interferes wrongfully or officiously. The untrained man, . . . the interloper as to the professions. I. Taylor.
Source : Webster's Unabridged Dictionary, 1913