trillion
number /ˈtrɪljən/
/ˈtrɪljən/
- a trillion, trillions (of…)(informal) a very large amount There are more examples of how to use numbers at the entry for hundred.
- (old-fashioned, British English) one million million million; 1 000 000 000 000 000 000
Word Originlate 17th cent.: from French, from million, by substitution of the prefix tri- ‘three’ for the initial letters.