Definition of billionth

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  • billionth is a valid Scrabble US word with a point value of 14
  • billionth is a valid Scrabble UK word with a point value of 14
  • billionth is a valid Words with friends word with a point value of 17

Definition of billionth

  • one part in a billion equal parts (noun)

    Synonyms

    1. one-billionth
  • position 1,000,000,000 in a countable series of things (noun)
  • the ordinal number of one billion in counting order (adjective)

See definition of billionth in Merriam Webster