What is a transmission that disturbs other communications called?

In radio regulations, any transmission that degrades, obstructs, or repeatedly interrupts other authorized radiocommunications is officially defined as 'harmful interference.' This is a specific legal and technical term used by Innovation, Science and Economic Development (ISED) Canada. Amateurs are required by law to operate their stations in a manner that avoids causing harmful interference to other radio services. The distractors are incorrect because they refer to specific modes or behaviors rather than the act of disrupting signals. For instance, 'Unidentified transmissions' simply lack a call sign, and 'Interrupted CW' is just a mode of telegraphy.