The definition of transgender is anyone who identifies with a gender other than the one they were assigned at birth. It is therefore an umbrella term that includes nonbinary genders. Being transgender and transitioning are separate things.

That being said, when people are talking about “trans people” they often mean binary trans people (ie men and women), especially in the current political context.

It’s also not unheard of for some nonbinary people to be uncomfortable with calling themselves trans, presumably for the associations with binary trans people.

Edit: i should clarify, by this I mean transgender definitionally in the abstract. When talking about a specific person’s identity, it just comes down how they identify. If an enby doesn’t identify as trans for any reason, don’t call them trans.

Seconding this! I did my science writing in grad school with git and markdown.

I would add another caveat that if you’re in a committed relationship, you owe it to existing partners when starting up a new relationship to ensure that they’re comfortable with the change and feel that their relationship is honoured.

If you can’t do that it’s not actually a committed relationship, it’s solo poly. If you have absolute freedom to date anyone you want, the corrolary is your partners are left only with the choice to stay with the relationship as it is, or leave.

Have you discussed polyamory and what it looks like for your relationship with your girlfriend and partner?