[sev-uh n-tee-ith]
  1. a seventieth part, especially of one (1/70).
  2. the seventieth member of a series.

Origin of seventieth

First recorded in 1250–1300, seventieth is from the Middle English word seventithe. See seventy, -eth2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for seventieth

Contemporary Examples of seventieth

Historical Examples of seventieth

  • December 29, 1879, Mr. Gladstone attained the seventieth year of his age.

    The Grand Old Man

    Richard B. Cook

  • On his seventieth birthday Mr. Bright justified what he called the policy of 1846.

  • There he remained till his death in 929, in the seventieth year of his age.

    Shakespeare's Family

    Mrs. C. C. Stopes

  • On his seventieth birthday Mark Twain was dazzled by his liberty.

  • He died in that city on the 9th of August 1672, in the seventieth year of his age.

British Dictionary definitions for seventieth


  1. (usually prenominal)
    1. being the ordinal number of seventy in numbering or counting order, position, time, etc: often written 70th
    2. (as noun)the seventieth in line
    1. one of 70 approximately equal parts of something
    2. (as modifier)a seventieth part
  1. the fraction equal to one divided by 70 (1/70)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for seventieth

late 13c., from seventy + -th (1).

Online Etymology Dictionary, © 2010 Douglas Harper