Definition

1. Noun:
   • The cardinal number equal to 1,000,000,000: "one thousand million" is a numerical term representing the quantity of one billion (1,000,000,000). It is composed of the digits one, followed by nine zeros.

Usage

• This term is used to specify a very large quantity or amount. It is a precise numerical expression.
• In modern English, especially in American English, this number is more commonly referred to as "one billion."
• The term can be used in contexts discussing population, finance, distances, or any large-scale measurement.

Examples

• Noun:
  • The project cost over one thousand million dollars to complete.
  • The country has a population of nearly one thousand million people.

Advanced Usage

• Historical/Long Scale Usage: In some historical or regional contexts (e.g., traditional British English), "one thousand million" was used to avoid ambiguity with the now-archaic "billion," which could mean a million million (1,000,000,000,000). In modern international and scientific English, this distinction is largely obsolete.
• Scientific Notation: This number can be expressed as 10⁹ or 1 x 10⁹.

Variants and Related Words

• Billion (noun): The modern standard term for 1,000,000,000.
  • The company's revenue reached ten billion dollars.
• Milliard (noun): An archaic term, chiefly British, synonymous with one thousand million.
• Giga- (prefix): A prefix in the metric system denoting a factor of one billion (e.g., gigabyte, gigawatt).

Synonyms

• Billion: One thousand million.
• 10⁹: The expression in scientific notation.
• A thousand million: A less common phrasing with the same meaning.

Notes on Usage

• The phrase "one thousand million" is unambiguous but is often considered formal or technical. In everyday language, "one billion" is overwhelmingly preferred, particularly in American English and international contexts.
• When writing the numeral, it is standard to write it as 1,000,000,000 (using commas as thousand separators) or 1000000000.

Noun

1. the number that is represented as a one followed by 9 zeros