| billion | (n) the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen, Syn. one million million, 1000000000000 |
| billion | (n) the number that is represented as a one followed by 9 zeros, Syn. 1000000000, one thousand million |
| trillion | (n) the number that is represented as a one followed by 12 zeros, Syn. one million million, 1000000000000, Example: in England they call a trillion a billion |