What does interferer mean?
An interferer is a noun for someone who inserts themselves into affairs that are not their concern. The word often carries a mildly formal or literary tone and implies more than curiosity: the person may seek to direct, obstruct, or influence events. Common alternatives in social contexts include busybody, meddler, and interloper, although interferer can sound more pointed. In radio, radar, and engineering contexts, the noun can instead identify a source or device that causes interference, such as an unintended transmitter. The term is therefore less common than the verb interfere, but it usefully labels the agent rather than the action. Knowing the distinction helps writers choose a precise term for unwanted meddling without implying that every intervention is illegitimate. It also preserves a broader technical sense: the interference itself may be incidental, while the source causing it can still be identified as an interferer.
nounAn interferer is someone who intrudes on matters that are not their concern, typically to obstruct, direct, or otherwise influence them. In technical usage, the term can also denote a device, signal, or source that produces interference.
- A person who intrudes into affairs that are not their concern, especially in order to obstruct, influence, or direct them.
- A device, signal, or source that produces interference in a technical or communications context.
"Rather than welcome the adviser, the board dismissed him as a meddlesome interferer."
"The old man warned that no self-appointed interferer could improve a situation they did not understand."
"In the test report, the technician identified a high-power radio transmitter as the main interferer."
The regular plural is used when referring to multiple people who intrude or interfere, or to multiple technical sources of interference.
"Neighboring officials accused the foreign interferers of attempting to influence the election."
An interferer does more than intrude: by definition, they take an interest that was never theirs.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does interferer come from?
Interferer is an English agent noun formed from interfere with the suffix -er. Interfere entered English in the early 17th century from French interférer, from Latin interferre, literally “to carry between” and hence “to come between or intervene.” Its Latin root ferre, meaning “to carry” or “to bear,” also underlies refer, defer, confer, and transfer.
Related word forms
How interferer is actually used
The noun is relatively uncommon in everyday English and often has a formal or literary tone. In social contexts, busybody or meddler may sound more natural, while in communications and engineering contexts the word has a broader technical application.
Easily confused with interferer
An interferer is the person, device, or source responsible for interfering, whereas interference is the act or effect of obstructing or affecting something.