billion(redirected from gillion)
Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.
billion[Fr. bi, two, + million, million]
1. In the U.S., billion is a number equal to 1 followed by 9 zeros (1,000,000,000) or (109).
2. In Europe, billion is a number equal to 1 followed by 12 zeros (1012), that is, bi-million, or twice the number of zeros in a million (106).