Ally

When used in relation to the LGBTQIA+ community, an ally or an accomplice is someone who supports LGBTQIA+ people in partnership with them and advocates for them, even without having a direct stake in the cause, such as a cisgender person who actively supports transgender rights. Being an ally is not considered an identity; it is an ongoing process that requires action and continuous learning.

The "A" in acronyms like LGBTQIA+ does not mean Ally. However, allyship can provide plausible deniability for someone who is not ready to come out or who cannot safely come out, but still wants to be close to queer culture and politics.

Resources

 * "A Guide to Being an Ally to Transgender and Nonbinary Youth" by The Trevor Project (backup link)