Bi or bi may refer to:

  • Bi (jade), a type of jade disc produced in ancient China
  • "Bi" (song), a 1993 song by Living Colour
  • Bi (album), a 2008 album by Astyplaz
  • Bi-, a number prefix denoting two
  • Billon (alloy), an alloy of less than 50% silver
  • Bisexuality, a sexual orientation
  • Bipolar (disambiguation), a term used in several sciences and technologies
  • 비 or Rain, South Korean entertainer
  • Ы or yery, a Cyrillic letter

Read more about BI:  Code or Symbol, Acronyms