Tril·lion n. According to the French notation, which is used upon the Continent generally and in the United States, the number expressed by a unit with twelve ciphers annexed; a million millions; according to the English notation, the number produced by involving a million to the third power, or the number represented by a unit with eighteen ciphers annexed. See the Note under Numeration.
adj 1: one quintillion in Great Britain [syn: a trillion]
2: one million million in the United States [syn: a trillion]
n 1: the number that is represented as a one followed by 18
zeros; "in England they call a quintillion a trillion"
[syn: one million million million]
2: the number that is represented as a one followed by 12
zeros; "in England they call a trillion a billion" [syn: one
million million, 1000000000000]