What does ignitor mean?
An ignitor is something that initiates combustion: most often an electrical device that creates the initial spark or heat needed to start an engine, furnace, or gas burner. In technical descriptions, it is a component rather than the fuel itself and generally differs from the igniter, the part that keeps a flame burning once combustion has begun. The word can also refer metaphorically or literally to a person who sets something alight, though this sense is much less common. Its specialized modern use gives it a technical, industrial character, while its basic meaning connects closely with ignition and the deliberate starting of a fire or reaction. The term is particularly useful when precision matters—for example, when distinguishing a failed burner ignitor from a malfunction elsewhere in an appliance or heating system.
A device that starts combustion in an engine, furnace, burner, or similar system, usually by producing a spark or localized heat.
"The ignitor sparked repeatedly, but the fuel never caught."
The term is chiefly technical and is often used for an electrical heating or sparking component.
A person or thing that sets something on fire or initiates a process.
"They blamed the spark, the ignitor of the accidental fire."
This sense is uncommon in everyday use and can be figurative.
The plural is used when referring to multiple initiating devices or, rarely, multiple people who set fires.
"The technician tested both ignitors before replacing the control module."
An ignitor may be small, but it has a dramatic job: it gives combustion its opening cue.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does ignitor come from?
The word comes from the Latin noun ignitor, meaning “one who or that which sets on fire,” formed from ignire, “to set on fire, kindle.” English later developed a related family through the verb “ignite” and the noun “ignition,” both based on the same Latin root. The modern technical sense developed with combustion systems, where an ignitor initiates burning rather than maintaining it.
Related word forms
How ignitor is actually used
In modern technical use, the word is usually applied to machinery and is most common in descriptions of burners, furnaces, and combustion systems. The broader sense involving a person is uncommon and often sounds literary or figurative.
Easily confused with ignitor
Both names denote a device that initiates combustion, but “igniter” is especially common for pyrotechnic or flame-producing devices, whereas “ignitor” is frequently used for an electrical component in an engine or burner.