Definition of sexual orientation
a person’s sexual identity or self-identification as bisexual, heterosexual, homosexual, pansexual etc.
Source: Merriam-Webster Dictionary
Basic Definitions: Sexual Orientation, Gender Identity and Expression (SOGIE)
Asexual - not sexually attracted to anyone and/or no desire to act on attraction to anyone. Does not necessarily mean sexless. Asexual people sometimes do experience affectional (romantic) attraction.
Bisexual - attracted to people of one’s own gender and people of other gender(s). Two common misconceptions are that bisexual people are attracted to everyone and anyone, or that they just haven’t “decided.” Often referred to as “bi.” See also Pansexual/Fluid and Queer.
Gay - generally refers to a man who is attracted to men. Sometimes refers to all people who are attracted to people of the same sex; sometimes “homosexual” is used for this also, although this term is seen by many today as a medicalized term that should be retired from common use.
Lesbian - a woman who is attracted to women. Sometimes also or alternately “same-gender-loving woman” or “woman loving woman.” See also Gay.
Pansexual/Fluid - attracted to people regardless of gender. Sometimes also or alternately “omnisexual” or “polysexual.” See also Bisexual and Queer.
Questioning - one who may be unsure of, reconsidering, or chooses to hold off identifying their sexual identity or gender expression or identity.
Queer - traditionally a derogatory term, yet reclaimed and appropriated by some LGBTQ individuals as a term of self-identification. It is an umbrella term which embraces a matrix of sexual preferences, gender expressions, and habits that are not of the heterosexual, heteronormative, or gender-binary majority. It is not a universally accepted term by all members of the LGBT community, and it is often considered offensive when used by heterosexuals.
Straight - attracted to people of the “opposite” sex (see below); also sometimes generally used to refer to people whose sexualities are societally normative. Alternately referred to as “heterosexual.”