■ cardinal number ( plural ~s or (with numeral or quantifying word) same)
1》 the number equivalent to the product of a thousand and a million; 1,000,000,000 or 10 9 .
↘ Brit. dated a million million (1,000,000,000,000 or 10 12 ).
2》 ( ~s ) informal a very large number or amount.
Derivatives
~th ordinal number .
Origin
C17: from Fr., from million , by substitution of the prefix bi- 'two' for the initial letters.