heterosexual

As a noun heterosexual

is heterosexual.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between heterosexual and retrosexual

is that heterosexual is heterosexual while retrosexual is a man who embraces traditional masculinity in his dress and behavior.

As nouns the difference between pansexual and heterosexual

is that pansexual is someone who is attracted to all types of people regardless of gender, gender identity, or sexual orientation while heterosexual is heterosexual.

As an adjective pansexual

is sexually attracted or open to all people regardless of gender, gender identity, or sexual orientation.

As an initialism HM

is his Majesty, the title of a king.

As an adjective heterosexual is

sexually attracted to members of the opposite sex.

As a noun heterosexual is

a heterosexual person, or other heterosexual organism.

As a noun heterosexual

is heterosexual.

As an adjective human is

(label) classical (of or pertaining to the classical - latin, greek - languages, literature, history and philosophy).

As adjectives the difference between cissexual and heterosexual

is that cissexual is having a gender identity which matches one's birth sex; for example, identifying as male and having (been born with) male genitalia while heterosexual is sexually attracted to members of the opposite sex.

As a noun heterosexual is

a heterosexual person, or other heterosexual organism.

As nouns the difference between heterosexual and gay

is that heterosexual is heterosexual while gay is nape.

As a verb gay is

to crow.

As nouns the difference between auto and heterosexual

is that auto is car while heterosexual is heterosexual.

As nouns the difference between heterosexual and heterosociality

is that heterosexual is heterosexual while heterosociality is socialization (social interaction, social relationships) with members of the opposite sex, as distinguished from sexual interaction with or attraction to members of the opposite sex (heterosexuality) and social interaction with members of the same sex (homosociality).