The Collaborative International Dictionary
Interferer
Interferer \In`ter*fer"er\, n. One who interferes.
Wiktionary
interferer
n. A person who, or thing that, interferes
Usage examples of "interferer".
A strong interferer ray can be offset by more power in the death machine.
I assure you, I regard Robbins as an interferer with the cosmos and fair order of things.
And they made good laws and kept the peace and saved good trees from being unnecessarily cut down, and liberated young dwarfs and young satyrs from being sent to school, and generally stopped busybodies and interferers and encouraged ordinary people who wanted to live and let live.