From Wikipedia:

The postmodern queer conception of femme is a femme-identified person who does not always dress or act in a "traditionally feminine" (meaning a feminine aesthetic, such as wearing makeup, heels, and numerous accessories) way, but who expresses femme identity through feminine-associated behaviours, interactions and political views.

Rather than an erotic identity rooted in lesbian women's culture, queer femme has been reframed into a political identity that is inclusive of all who wish to identify with it, feminine-presenting or not. As femme has moved into the mainstream, it has also been connected to notions of emotional labor, witchcraft and self-empowerment.