billionth
bil|lionth /b'ɪljənθ/ (billionths)
1 [ORD]
The billionth item in a series is the one you count as number one billion.
Disney will claim its one billionth visitor before the end of the century.
2 [FRACTION]
A billionth is one of a billion equal parts of something.
...a billionth of a second.
1 [ORD]
The billionth item in a series is the one you count as number one billion.
Disney will claim its one billionth visitor before the end of the century.
2 [FRACTION]
A billionth is one of a billion equal parts of something.
...a billionth of a second.