Definition of interlope in US English:

interlope

verb

[no object]often as adjective interloping
  • Become involved in a place or situation where one is not wanted or is considered not to belong.

    ‘the company's position was undermined by interloping English traders’
    ‘an interloping male will often try to kill the resident cubs’
    ‘impostors have tried to interlope on the action’

Pronunciation