noun.
In Great Britain, a million of millions; as many millions as there are units in a million (1,000,000,000,000).
noun.
In France and the United States, a thousand millions (1,000,000,000).
the GNU version of the Collaborative International Dictionary of English
noun.
According to the French and American method of numeration, a thousand millions, or 1,000,000,000; according to the English method, a million millions, or 1,000,000,000,000. See numeration.