WILL NOT HAVE ALL TERMS
Gay- Refers to a man who has a romantic and/or sexual orientation towards men. Also a generic term for lesbian and gay sexuality - some women define themselves as gay rather than lesbian. Some non-binary people may also identify with this term.
Lesbian- Refers to a woman who has a romantic and/or sexual orientation towards women. Some non-binary people may also identify with this term.
Bisexual- Bi is an umbrella term used to describe a romantic and/or sexual orientation towards more than one gender. (Bi people may describe themselves using one or more of a wide variety of terms, including, but not limited to, bisexual, pan, queer, and some other non-monosexual and non-monoromantic identities.)
Trans- An umbrella term to describe people whose gender is not the same as, or does not sit comfortably with, the sex they were assigned at birth. Trans people may describe themselves using one or more of a wide variety of terms, including (but not limited to) transgender, transsexual, gender-queer (GQ), gender-fluid, non-binary, gender-variant, crossdresser, genderless, agender, nongender, third gender, bi-gender, trans man, trans woman, trans masculine, trans feminine and neutrois
Trans Women- A term used to describe someone who is assigned male at birth but identifies and lives as a woman. This may be shortened to trans woman, or MTF, an abbreviation for male-to-female.
Trans Men- A term used to describe someone who is assigned female at birth but identifies and lives as a man. This may be shortened to trans man, or FTM, an abbreviation for female-to-male.
Queer- Queer is a term used by those wanting to reject specific labels of romantic orientation, sexual orientation and/or gender identity. It can also be a way of rejecting the perceived norms of the LGBT community (racism, sizeism, ableism etc). Although some LGBT people view the word as a slur, it was reclaimed in the late 80s by the queer community who have embraced it.
Asexual- person who does not experience sexual attraction. Some asexual people experience romantic attraction, while others do not. Asexual people who experience romantic attraction might also use terms such as gay, bi, lesbian, straight and queer in conjunction with asexual to describe the direction of their romantic attraction.
Non-binary- An umbrella term for people whose gender identity doesn't sit comfortably with 'man' or 'woman'. Non-binary identities are varied and can include people who identify with some aspects of binary identities, while others reject them entirely.
Pansexual- Refers to a person whose romantic and/or sexual attraction towards others is not limited by sex or gender.
Cisgender- Someone whose gender identity is the same as the sex they were assigned at birth. Non-trans is also used by some people.
Straight/Heterosexual- Refers to a man who has a romantic and/or sexual orientation towards women or to a woman who has a romantic and/or sexual orientation towards men.
Ally- A (typically) straight and/or cis person who supports members of the LGBT community.
Homophobia- The fear or dislike of someone, based on prejudice or negative attitudes, beliefs or views about lesbian, gay or bi people. Homophobic bullying may be targeted at people who are, or who are perceived to be, lesbian, gay or bi.
Polysexual- Someone who is sexually and/or romantically attracted to multiple genders. (It is not the same as being bisexual or pansexual, although all of these sexualities involve being attracted to more than one gender. It also is not the same as being polyamorous.)