The classification of people as male or female. At birth infants are assigned a sex, usually based on the appearance of their external anatomy. (This is what is written on the birth certificate.) However, a person's sex is actually a combination of bodily characteristics including chromosomes, hormones, internal and external reproductive organs, and secondary sex characteristics.
One's internal, deeply held sense of one's gender. For transgender people, their own internal gender identity does not match the sex they were assigned at birth. Most people have a gender identity of man or woman (or boy or girl). For some people, their gender identity does not fit neatly into one of those two choices. Unlike gender expression (see below) gender identity is not visible to others.
External manifestations of gender, expressed through one's name, pronouns, clothing, haircut, behavior, voice or body characteristics. Society identifies these cues as masculine and feminine, although what is considered masculine and feminine changes over time and varies by culture. Typically, transgender people seek to make their gender expression align with their gender identity, rather than the sex they were assigned at birth.
Describes an individual's enduring physical, romantic and/or emotional attraction to another person. Gender identity and sexual orientation are not the same. Transgender people may be straight, lesbian, gay or bisexual. For example, a person who transitions from male to female and is attracted solely to men would identify as a straight woman.
An umbrella term for people whose gender identity and/or gender expression differs from what is typically associated with the sex they were assigned at birth. People under the transgender umbrella may describe themselves using one or more of a wide variety of terms, including transgender. Some of those terms are defined below. Use the descriptive term preferred by the individual. Many transgender people are prescribed hormones by their doctors to change their bodies. Some undergo surgery as well. But not all transgender people can or will take those steps, and a transgender identity is not dependent upon medical procedures.
An older term that originated in the medical and psychological communities. Still preferred by some people who have permanently changed - or seek to change - their bodies through medical interventions (including but not limited to hormones and/or surgeries). Unlike transgender, transsexual is not an umbrella term. Many transgender people do not identify as transsexual and prefer the word transgender. It is best to ask which term an individual prefers. If preferred, use as an adjective: transsexual woman or transsexual man.
Used as shorthand to mean transgender or transsexual - or sometimes to be inclusive of a wide variety of identities under the transgender umbrella. Because its meaning is not precise or widely understood, be careful when using it with audiences who may not understand what it means. Avoid unless used in a direct quote or in cases where you can clearly explain the term's meaning in the context of your story.
People who were assigned female at birth but identify and live as a man may use this term to describe themselves. They may shorten it to trans man. (Note: trans man, not "transman.") Some may also use FTM, an abbreviation for female-to-male. Some may prefer to simply be called men, without any modifier. It is best to ask which term an individual prefers.
People who were assigned male at birth but identify and live as a woman may use this term to describe themselves. They may shorten to trans woman. (Note: trans woman, not "transwoman.") Some may also use MTF, an abbreviation for male-to-female. Some may prefer to simply be called women, without any modifier. It is best to ask which term an individual prefers.
For more definitions from the GLAAD Media Reference Guide, visit http://www.glaad.org/reference/transgender.