Adjective billion has 2 senses
  1. billion, a billion - denoting a quantity consisting of one thousand million items or units in the United States
    Antonym: ordinal (indirect, via cardinal)
  2. billion, a billion - denoting a quantity consisting of one million million items or units in Great Britain
    Antonym: ordinal (indirect, via cardinal)
,Noun billion has 2 senses
  1. billion, one million million, 1000000000000 - 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
    --1 is a kind of large integer
  2. billion, one thousand million, 1000000000 - the number that is represented as a one followed by 9 zeros
    --2 is a kind of large integer
    --2 has particulars: milliard
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