What does convertor mean?
A convertor is a noun denoting something that transforms one kind of thing into another — most often a physical device that converts electrical current, signal formats, or exhaust gases into different forms. Familiar examples include a catalytic convertor, which reduces harmful car emissions, and an analogue-to-digital convertor, which turns sound waves into data a computer can process. The word derives from the Latin verb convertere, meaning 'to turn around' or 'transform', and entered English through the related term 'convert'. In modern usage 'convertor' is essentially a variant spelling of 'converter', which has become the overwhelmingly dominant form worldwide, particularly in American technical literature; 'convertor' persists chiefly in British contexts and certain established engineering phrases. Because the two spellings are interchangeable in meaning, writers today almost always choose 'converter', reserving 'convertor' for older texts or specific industry conventions.
nounA device or apparatus that changes something from one form, state, or system into another, such as alternating current to direct current or one data format to another. It is a variant spelling of the more common word 'converter'.
- A device that changes energy, current, signal, or data from one form to another (e.g. a catalytic convertor, an analogue-to-digital convertor).
- Less commonly, a person or thing that brings about conversion, especially religious conversion.
"The engineer fitted a catalytic convertor to reduce the car's exhaust emissions."
"The new power supply includes a step-down convertor so the laptop can be charged abroad."
"Analogue recordings were digitised using a high-quality audio convertor in the studio."
As a countable noun, it takes the regular plural.
"The plant installed three voltage convertors across its production lines."
Despite sounding like a modern gadget word, 'convertor' traces straight back to Latin convertere — 'to turn around' — a verb Romans used over two thousand years ago.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of convertor
The word 'convertor' comes from the same root as 'convert': the Latin verb convertere, formed from com- ('together') plus vertere ('to turn'), meaning literally 'to turn around completely'. This Latin root gave rise both to the religious sense of converting a person to a faith and to the mechanical sense of converting one form of matter or energy into another. The agent-noun form in '-or', modelled on Latin-style agent nouns, appeared in English alongside 'converter'; both spellings have been in use since at least the nineteenth century, with 'converter' gradually becoming dominant.
How convertor is actually used
The spelling 'convertor' is now largely superseded by 'converter', which is standard in technical writing and everyday use; 'convertor' survives mainly as an older British variant and appears in some fixed engineering terms. It is a countable noun with a normal plural.
Easily confused with convertor
'Convertor' is simply a variant spelling of 'converter', which is now the standard and far more common form, especially in American English.