seventieth

American  

[sev-uhn-tee-ith] / ˈsɛv ən ti ɪθ /

adjective

1. next after the sixty-ninth; being the ordinal number for 70.

2. being one of 70 equal parts.

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noun

1. a seventieth part, especially of one (1/70).

2. the seventieth member of a series.

ˈseventieth British  

/ ˈsɛvəntɪɪθ /

adjective

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

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noun

1. 1. one of 70 approximately equal parts of something

   2. ( as modifier )

      a seventieth part

2. the fraction equal to one divided by 70 ( 1/ 70 )

Etymology

Origin of seventieth

First recorded in 1250–1300, seventieth is from the Middle English word seventithe. See seventy, -eth ²

Example Sentences

The letter expresses the Queen Elizabeth II's "grateful thanks" for Charlie's "kind message on the occasion of the seventieth anniversary of my accession to the throne".

From BBC • Sep. 17, 2022

Last fall, to celebrate the seventieth birthday of the People’s Republic of China, the government planned the largest military parade and “mass pageant” in Beijing’s history.

From The New Yorker • Jan. 6, 2020

On 26 August 2016, the club made an announcement – “beautifully timed in our seventieth anniversary” – that the game was up for good.

From The Guardian • Sep. 26, 2017

The week I went shooting with Clayton was also the week of my mother’s seventieth and my sister’s fiftieth birthday party.

From Salon • Sep. 26, 2015

“Someone asked me an interesting question yesterday,” Morrie said now, looking over my shoulder at the wallhanging behind me, a quilt of hopeful messages that friends had stitched for him on his seventieth birthday.

From "Tuesdays with Morrie" by Mitch Albom