Definition of Gray code in English:

Gray code


  • A numerical code used in computing in which consecutive integers are represented by binary numbers differing in only one digit.

    • ‘The standard remedy is an alternative to the ordinary binary numbers called a Gray code, which replaces the cliffs with gentler slopes.’
    • ‘He popularized the application of Gray codes to puzzle solving.’
    • ‘Unusual number system bases and Gray codes are described in detail in two chapters.’
    • ‘The gray code is sometimes referred to as reflected binary, because the first eight values compare with those of the last 8 values, but in reverse order.’
    • ‘The geometry is intriguing, and there are interesting connections with Gray codes and even with the I Ching, but I'm not so sure that biologists will find the concept useful.’


1950s named after Frank Gray (1887–1969), American physicist.