Trillion

Trillion is a number with two distinct definitions:

• 1,000,000,000,000, i.e. one million million, or 10¹², as defined on the short scale. This is now the meaning in both American and British English.
• 1,000,000,000,000,000,000, i.e. 10¹⁸, as defined on the long scale. This is one million times larger than the short scale trillion. This is the historical meaning in English and the current use in many non-English-speaking countries where trillion and billion 10¹² maintain their long scale definitions.