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Definition of fortieth:

  1. Constituting one of forty equal parts into which anything is divided.
  2. Following the thirty- ninth, or preceded by thirty- nine units, things, or parts.
  3. One of forty equal parts into which one whole is divided; the quotient of a unit divided by forty; one next in order after the thirty- ninth.


common denominator, ordinal, eighth, denominator, fifteenth, eleventh, fourth, fifth, and, common fraction, fiftieth, hundredth, 40th, billionth, fourteenth.

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