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Adjective: billionth  bil-yunth [N. Amer], bi-lee-(y)unth [Brit]
  1. The ordinal number of one billion in counting order
Noun: billionth  bil-yunth [N. Amer], bi-lee-(y)unth [Brit]
  1. Position 1,000,000,000 in a countable series of things
     
  2. One part in a billion equal parts
    - one-billionth

Derived forms: billionths

See also: ordinal

Type of: common fraction, rank, simple fraction, vulgar fraction [Brit]

Encyclopedia: Billionth

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