seventieth

/ˈsɛvəntiəθ/
adjective
  1. Coming after the sixty-ninth in a series; ordinal form of seventy.
    • The company is planning its seventieth anniversary celebration next year.
    • She celebrated her seventieth birthday with a big party.
    • He finished in seventieth place out of one hundred runners.
noun
  1. One of seventy equal parts of a whole.
    • Each shareholder owns a seventieth of the company's stock.
    • He received a seventieth of the total inheritance.
    • The recipe calls for a seventieth of a cup of vanilla extract.
  2. The seventieth item in a series; the position after the sixty-ninth.
    • He crossed the finish line as the seventieth.
    • The seventieth on the list was the last one accepted.
    • She was the seventieth to sign the petition.
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