'Sextillion' definitions:

Definition of 'sextillion'

(from WordNet)
noun
The number that is represented as a one followed by 21 zeros

Definition of 'Sextillion'

From: GCIDE
  • Sextillion \Sex*til"lion\, n. [Formed (in imitation of million) fr. L. sextus sixth, sex six: cf. F. sextilion.] According to the method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-one ciphers annexed. According to the English method, a million raised to the sixth power, or the number expressed by a unit with thirty-six ciphers annexed. See Numeration. [1913 Webster]