Definition of trillion in English:

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Pronunciation: /ˈtrɪljən/

cardinal number (plural trillions or (with numeral or quantifying word) same)

1A million million (1,000,000,000,000 or 1012).
Example sentences
  • Scientists tell us that just after the ‘big bang’ the temperature was 100 million trillion trillion degrees.
  • There are now more than 200 million vehicles traveling 5 trillion miles per year in the United States alone.
  • Estimates for the total cost of reunification range from hundreds of billion to a few trillion dollars.
1.1 (trillions) informal A very large number or amount: the yammering of trillions of voices
More example sentences
  • All this ridiculous wealth: trillions and zillions of it in less than a cubic mile of the City.
  • The amount is a joke compared to the trillions lost by investors and the billions in fees that the brokerages earned.
  • You can't get a hundred per cent guarantees and you can't spend trillions of dollars trying to guard a single Qantas office.
1.2British dated A million million million (1,000,000,000,000,000,000 or 1018).
Example sentences
  • Furthermore, the British trillion is a million times of its American counterpart!
  • A British trillion used to be one million American trillions, but they are mostly the same now.



Pronunciation: /ˈtrɪljənθ/
ordinal number
Example sentences
  • Once again, for the millionth and trillionth time (oh, trust me, I know), I am asking my lovely readers to become lovelier reviewers.
  • Neko called Ruy's cell phone for the trillionth time and still nobody picked up.


Late 17th century: from French, from million, by substitution of the prefix tri- 'three' for the initial letters.

Words that rhyme with trillion

billion, jillion, million, bajillion, modillion, multibillion, multimillion, pillion, septillion, sextillion, squillion, zillion

For editors and proofreaders

Line breaks: tril|lion

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