"trillion" in the noun sense
1. million, billion, trillion, zillion, jillion, gazillion, bazillion
a very large indefinite number (usually hyperbole
"there were millions of flies"
2. trillion, one million million million
the number that is represented as a one followed by 18 zeros
"in England they call a quintillion a trillion"
3. trillion, one million million, 1000000000000
the number that is represented as a one followed by 12 zeros
"in England they call a trillion a billion"
"trillion" in the adjective sense
1. trillion
one quintillion in Great Britain
2. trillion
one million million in the United States
Source: WordNet® (An amazing lexical database of English)
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