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trillion

number
 
🔊/ˈtrɪljən/
🔊/ˈtrɪljən/
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  1.  
    1 000 000 000 000; one million million万亿；兆 You say a, one, two, several, etc. trillion without a final ‘s’ on ‘trillion’. Trillions (of…) can be used if there is no number or quantity before it. Always use a plural verb with trillion or trillions.
  2.  
    a trillion, trillions (of…)
    (informal) a very large amount大量；无数 There are more examples of how to use numbers at the entry for hundred.
  3. (old-fashioned, British English) one million million million; 1 000 000 000 000 000 000百万兆
    4. Word Originlate 17th cent.: from French, from million, by substitution of the prefix tri- ‘three’ for the initial letters.