Binary basically means composed of two parts.

It may refer specifically to:

• Binary numeral system, a representation for numbers using only two digits.
• Binary file, a computer file that comprises a sequence of encoded numerical values rather than human-readable text, including an
  • Executable file, a computer file containing machine code that can be executed by a specific operating system.
• Binary compound a chemical compound containing two different chemical elements
• Binary (chemical weapon), one that contains two capsules, each of which contains a chemical, that when combined with the contents of the other, will react to make a toxic agent.
• Binary (astronomy), a star system with two stars.
• Binary (novel), a 1972 novel by Michael Crichton (writing as John Lange).
• Binary (comics), a superheroine in the Marvel Universe.
• Binary form, a way of structuring a piece of music.

Binär | Binaire | בינארי | Binario | バイナリ | Binär