billion

Adjective

• denoting a quantity consisting of one million million items or units in Great Britain

• denoting a quantity consisting of one thousand million items or units in the United States

Noun

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

• a very large indefinite number (usually hyperbole)
  • there were millions of flies
    

• 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

Related words

• Synonyms: 
  one thousand million , 1000000000 , million , trillion , zillion , jillion , gazillion , one million million , 1000000000000