WordWeb Online

1. One million million
    
2. [Brit, archaic] One quintillion

1. A very large indefinite number (usually hyperbole)
   - million, billion, zillion, jillion, gazillion
    
2. The number that is represented as a one followed by 12 zeros
   - one million million, 1000000000000
    
3. [Brit, archaic] The number that is represented as a one followed by 18 zeros
   - one million million million [Brit]

Derived forms: trillions

See also: cardinal

Type of: large indefinite amount, large indefinite quantity, large integer

Encyclopedia: Trillion