Definition of sextillion in English:

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Pronunciation: /sekˈstilyən/

cardinal number (plural sextillions or (with numeral) same)

1A thousand raised to the seventh power (1021).
Example sentences
  • And a mouse is miracle enough to stagger sextillions of infidels.
  • A further challenge is the humbling fact that the original cloud is billions of times wider and a hundred sextillion (100 x [10.sup.21]) times less dense than the star the models are trying to simulate.
  • In the last decades of the 20c, however, the North American use has become universal, providing the set million, billion, trillion, quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion.
1.1 dated, chiefly British A million raised to the sixth power (1036).



Pronunciation: /sekˈstilyənTH/
ordinal number
Example sentences
  • One amu is less than 200 sextillionths of a gram.


Late 17th century: from French, from million, by substitution of the prefix sexti- 'six' (from Latin sextus 'sixth') for the initial letters.

Words that rhyme with sextillion

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

For editors and proofreaders

Syllabification: sex·til·lion

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