Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The ordinal number matching the number one billion in a series.
  • noun One of a billion equal parts.

from The Century Dictionary.

  • Coming last in a set of a billion terms: an ordinal numeral.
  • Being one of a billion equal parts.
  • noun One of a billion equal parts; the quotient of unity divided by a billion.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective The ordinal form of the number one billion.
  • noun The person or thing in the billionth position.
  • noun One of a billion equal parts of a whole.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective the ordinal number of one billion in counting order
  • noun one part in a billion equal parts
  • noun position 1,000,000,000 in a countable series of things

Etymologies

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