As of my last knowledge update in September 2021, the term "transformer polarity" doesn't refer to a well-established concept in the context of transformers, at least not in the traditional electrical engineering sense. Transformers are devices that transfer electrical energy from one circuit to another through electromagnetic induction. They consist of primary and secondary coils wound around a common core.
However, there is a possibility that the term "transformer polarity" has gained significance or a new meaning beyond my last update. If you're referring to a concept introduced or developed after September 2021, I wouldn't have information about it. If this term has relevance in a different domain or field, I recommend checking more recent sources for accurate information.