sexual orientationnoun [ U or C ]
uk/ˌsek.sjʊəl ɔː.ri.enˈteɪ.ʃən/us/ˌsek.sjʊəl ɔːr.i.enˈteɪ.ʃən/the fact of someone preferring to have sexual relationships either with men, or with women, or with both:
Everyone will be treated equally, regardless of sexual orientation.
The club is open to people of all sexual orientations.