Femme is a feminine gender role which is sometimes used as a gender identity.
The term femme originated in communities of lesbian women. This referred to lesbian who often presented as female and took on a stereotypically feminine role. Femmes are often assumed to be sexually attracted to butches and/or masculine women, although this is not always the case. It should be noted that due to the community it originated from, many lesbians consider the use of the word femme by anyone other than a lesbian to be appropriative. For this reason, many people who identify with this gender identity choose the spelling of "fem" instead.
Femme was originally used by those assigned female at birth, but has been increasingly adopted by trans women and others in the transgender community.
Those who identify as femme may have the gender identity of woman and have a strongly feminine gender expression, or they may use femme as a non-binary gender identity aligned with femininity.