What is the meaning of Billion?

Either of two large amounts:

  1. a thousand million (logic: 1,000 × 1,000): 1 followed by nine zeros, 10.

    a thousand million (logic: 1,000 × 1,000): 1 followed by nine zeros, 10.

    A million (times a) million (logic: 1,000,000): a 1 followed by twelve zeros (10); a thousand milliard.

    An unspecified very large number.

    10

    trillion (10)

    billion (10)

    billion, a million-million, 10

    Source: wiktionary.org