Definition of seventy in English:

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Pronunciation: /ˈsevən(t)ē/

cardinal number (plural seventies)

1The number equivalent to the product of seven and ten; ten less than eighty; 70: about seventy people attended seventy were arrested (Roman numeral: lxx, LXX)
More example sentences
  • Most works of philosophy that run to seventy or eighty volumes are hard to summarize.
  • The agency is to allocate between seventy and eighty grants all over the country.
  • Most of the cards sold today are variations on themes introduced seventy to eighty years ago.
1.1 (seventies) The numbers from seventy to seventy-nine, especially the years of a century or of a person’s life: Dad was now in his seventies
More example sentences
  • It almost has the look of a city of the future, as seen in movies of the seventies and eighties!
  • Your work from the sixties and seventies would certainly lend support to that claim.
  • He was an icon to many of my Belfast school friends in the late seventies who were starting their own bands.
1.2Seventy years old: she was nearly seventy
More example sentences
  • He referred to a higher mortality rate of infant travellers and said that female travellers tended not to reach the age of seventy as often as female members of the settled community did.
  • The government should increase funding to Primary Schools by gradually raising the pensionable age to seventy, with a reasonable warning period.
  • And I told him that my mother and father, my two aunts, my two grandparents on both sides, they all died around the age of seventy.
1.3Seventy miles an hour: doing about seventy
More example sentences
  • Even though we were only going thirty miles an hour the other guy was going seventy.



Pronunciation: /ˈsevən(t)ēəTH/
ordinal number
Example sentences
  • Now, in the year of his seventieth birthday, Starchev is preparing for a new exhibition.
  • Congratulations to Jim Elliott, Crooke, who celebrated his seventieth birthday recently.
  • Prague-born pianist Ivan Moravec celebrated his seventieth birthday in 2000.


Pronunciation: /-ˌfōld/
adjective& adverb
Example sentences
  • The two investigators confirmed early work indicating that cellular extracts can change the stiffness of dermis between tenfold and seventyfold.


Old English hundseofontig, from hund- (of uncertain origin) + seofon 'seven'.

For editors and proofreaders

Syllabification: sev·en·ty

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