bisexual lighting UK /baɪˌsɛkʃʊəl ˈlaɪtɪŋ/US /baɪˌsɛkʃ(əw)əl ˈlaɪtɪŋ/ noun1 •The simultaneous use of pink, purple, and blue lighting, often to indicate bisexuality.Still, you'll understand what the cinephiles are calling "bisexual lighting," and the tender spots where the movie does reach you will definitely leave a mark. — 2021 formsbisexual lightings