seventieth
Americanadjective
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next after the sixty-ninth; being the ordinal number for 70.
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being one of 70 equal parts.
noun
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a seventieth part, especially of one (1/70).
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the seventieth member of a series.
adjective
noun
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one of 70 approximately equal parts of something
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( as modifier )
a seventieth part
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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
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Because, as chance would have it, my mother-in-law requested a cruise through Alaska for her seventieth birthday this summer.
From Salon • Jul. 4, 2025
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
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 plot unfolds on Hannaford’s seventieth birthday, as colleagues, critics, documentarians, and hangers-on—including a Bogdanovich-like younger director, played by Bogdanovich—gather to celebrate him.
From The New Yorker • Dec. 7, 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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
