Definitions of interference
the act of involving yourself in a situation or a thing that does not concern you and where your involvement is not wanted and not helpful; the action of doing something that prevents, delays, or otherwise changes something in a way that is unwanted
Landlord shall be at liberty to carry out essential maintenance work without interference upon any external part of the Premises.
the disturbance of radio signals or other data caused by signals or data from other sources
CBS agrees that in repairing and maintaining the tower it will take all necessary precautions to avoid any interference to the broadcasting activities of Koplar.