trillion

(noun) a very large indefinite number (usually hyperbole). Synonyms: million, billion, zillion, jillion, gazillion. Example: "There were millions of flies."

(noun) the number that is represented as a one followed by 18 zeros. Synonyms: one million million million. Example: "In england they call a quintillion a trillion."

(noun) the number that is represented as a one followed by 12 zeros. Synonyms: one million million, 1000000000000. Example: "In england they call a trillion a billion."

(adj) one quintillion in Great Britain.

(adj) one million million in the United States.