Informal/slang countable noun meaning a heterosexual person.
The event welcomes gays and heteros alike.
La manifestation accueille gays et hétéros sans distinction.
Informal/slang adjective meaning heterosexual; used both predicatively and attributively.
They are a hetero couple who met at college.
C’est un couple hétéro qui s’est rencontré à l’université.