1. 十亿
2. 数以十亿记；大量
3.（BrE）一万亿 词形变化
- 形容词 billion
- the number that is represented as a one followed by 9 zeros
- a very large indefinite number (usually hyperbole)
- denoting a quantity consisting of one thousand million items or units in the United States
- denoting a quantity consisting of one million million items or units in Great Britain
- the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen