seventieth

[ sev-uh n-tee-ith ]
/ ˈsɛv ən ti ɪθ /

adjective

next after the sixty-ninth; being the ordinal number for 70.
being one of 70 equal parts.

noun

a seventieth part, especially of one (1/70).
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for seventieth

British Dictionary definitions for seventieth

seventieth

/ (ˈsɛvəntɪɪθ) /

adjective

(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

noun

  1. one of 70 approximately equal parts of something
  2. (as modifier)a seventieth part
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