billionth

An ordinal number used to describe the position of something in a sequence that is one of a billion equal parts.

• 🇫🇷Adjectif numéral ordinal désignant la position d'un élément dans une séquence, ou utilisé pour exprimer une partie égale à un sur un milliard.

1. Ordinal position C1 formal

   Being the number one billion in a sequence; the ordinal form of one billion.

   • He was the billionth customer to enter the store.
   • The billionth star in the galaxy was cataloged by astronomers.
   • She received a prize as the billionth visitor to the website.

   🇫🇷Ordinal de milliard

2. Fractional part C1 formal

   One part in a billion equal parts of a whole.

   • A billionth of a second is called a nanosecond.
   • The concentration of the chemical was measured in billionths of a gram.
   • Only a billionth of the original sample remained after the experiment.

   🇫🇷Milliardième (fraction)

• more billionth comparative form
• most billionth superlative form

A noun referring to the ordinal number corresponding to one billion, representing the position in a series or one of a billion equal parts.

• 🇫🇷Nom désignant soit le nombre ordinal qui correspond à un milliardième élément dans une série, soit chacune des parties égales obtenues en divisant un tout en un milliard de parts.

1. Ordinal position B2 formal

   The position of number 1,000,000,000 in a countable series of things.

   • He was the billionth visitor to the website.
   • The company celebrated its billionth customer.
   • She received a prize for being the billionth downloader of the app.

   🇫🇷Milliardième (ordinal)

2. Fractional part C1 formal

   One part in a billion equal parts of a whole.

   • A billionth of a second is called a nanosecond.
   • The concentration of the chemical was measured in billionths of a gram.
   • Only a billionth of the original sample remained after the experiment.

   🇫🇷milliardième (partie)

3. Ordinal number B2 formal

   The ordinal number corresponding to one billion in counting order.

   • This is the billionth time I've told you to clean your room.
   • The billionth digit of pi is a subject of mathematical curiosity.
   • He finished in billionth place in the online competition.

   🇫🇷Milliardième (ordinal)

• billionths plural form
• billionths' possessive plural form
• billionth's possessive singular form

The cardinal numeral representing the quantity of one billion units (10⁹ in modern short-scale English); a composite number (2⁹×5⁹); a fundamental large-scale unit in the decimal system, widely used in mathematics, finance, economics, demographics, science, and global measurement. Note: In modern English (American and increasingly British), billion = 1,000,000,000; historically in British English, billion meant 10¹² (long scale), now obsolete. Also functions as a noun (denoting the symbol, quantity, or group of one billion), adjective/determiner (modifying nouns to indicate quantity), and pronoun (standing in for a plural noun phrase).

• 🇫🇷Nombre cardinal désignant un milliard (10⁹) d'objets, de personnes ou d'unités de compte ; grande unité fondamentale dans le système décimal moderne ; utilisé aussi comme nom, déterminant ou pronom.

1. Cardinal numeral: the number 1,000,000,000 A2 formal

   Used to denote a quantity of one billion persons or things; the integer equal to one thousand millions (10⁹) in modern short-scale English; a composite number (2⁹×5⁹); represents a billionfold quantity in counting, mathematics, finance, and everyday usage.

   • The global population exceeded eight billion in 2023.
   • She invested one billion dollars in renewable energy.
   • One billion plus one billion equals two billion.
   • The company's valuation reached one billion euros.
   • He watched one billion streams of his song worldwide.

   🇫🇷Milliard

2. Noun: the number, symbol, or group of one billion B1 formal

   A noun referring to the cardinal number one billion; the numeral symbol 1,000,000,000; a set, collection, or group consisting of one billion items; in currency, a billion-unit denomination; often used in plural form ('billions') to indicate extremely large, indefinite quantities.

   • The number one billion is a critical threshold in demographic studies.
   • Circle the billions in this global economic report.
   • He donated several billions to humanitarian causes.
   • The contract specifies a billion of manufactured components.
   • In informal speech, 'billions' often emphasizes an almost unimaginable scale.

   🇫🇷milliard (numéral)

3. Adjective/Determiner: amounting to one billion A2 formal

   Used attributively before a noun to indicate that the quantity or number of the noun is one billion; modifies plural countable nouns to specify exact quantity; typically remains singular when preceded by a specific number (e.g., two billion years).

   • They launched a billion-dollar infrastructure initiative.
   • We need a billion additional doses of the vaccine.
   • The simulation requires a billion iterations to converge.
   • She has a billion reasons to support the cause.
   • A billion mobile devices were connected to the internet last year.

   🇫🇷un milliard

4. Pronoun: one billion people or things (plural) B2 formal

   Used as a pronoun to refer to one billion previously mentioned or understood persons or things; takes plural verb agreement; often used in the plural form 'billions' to denote an unspecified vast number.

   • Ten billion data points were collected, but only a billion were analyzed.
   • I invited five billion potential users; a billion engaged with the platform.
   • How many units should we forecast? — A billion will align with market projections.
   • Several production lines operated, but a billion units met export standards.
   • Of the transactions processed, a billion were flagged for review.

   🇫🇷un milliard (pronom)

• billionth ordinal