Source : Webster's Revised Unabridged Dictionary (1913)

Interlope \In`ter*lope"\, v. i. [imp. & p. p. {Interloped}; p.
   pr. & vb. n. {Interloping}.] [See {Interloper}.]
   To run between parties and intercept without right the
   advantage that one should gain from the other; to traffic
   without a proper license; to intrude; to forestall others; to
   intermeddle.