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Meaning of twentieth

twen•ti•eth

Pronunciation: (twen'tē-ith, twun'-), [key]
— adj.
  1. next after the nineteenth; being the ordinal number for 20.
  2. being one of 20 equal parts.
—n.
  1. a twentieth part, esp. of one ().
  2. the twentieth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
twelve-tone technique Twentieth Amendment