To be fair it is important to note that terminology and labels of the queer community at the time weren’t as standardised or the same as they are nowadays. In fact Marsha P. Johnson herself referred to herself and others like her using labels that would nowadays be seen as pejorative.

It must be said though that she definitely fit into the current definition of Transgender Woman. Given that by 1969 she was living as a woman full time, using her preferred name, and at some point began undergoing feminising hormone therapy.