What is the meaning of Affirming?

present participle and gerund of affirm

The act of one who affirms something; an affirmation.

That affirms.

Accepting of same-sex/same-gender sexual relationships – or, more broadly, the gender identities, sexual orientations, and sexual relationships of LGBTQ people – on the same terms as those of cisgender, heterosexual people.

Source: wiktionary.org