Dictionary.com
Thesaurus.com

seventy

American  
[sev-uhn-tee] / ˈsɛv ən ti /

noun

plural

seventies
  1. a cardinal number, 10 times 7.

  2. a symbol for this number, as 70 or LXX.

  3. a set of this many persons or things.

  4. seventies, the numbers, years, degrees, or the like from 70 through 79, as in referring to numbered streets, indicating the years of a lifetime or of a century, or referring to degrees of temperature.

    They live in the Seventies. His uncle is in his early seventies. It was in the seventies yesterday.

  5. the Seventy, the body of scholars who produced the Septuagint.


adjective

  1. amounting to 70 in number.

seventy British  
/ ˈsɛvəntɪ /

noun

  1. the cardinal number that is the product of ten and seven See also number

  2. a numeral, 70, LXX, etc, representing this number

  3. (plural) the numbers 70–79, esp the 70th to the 79th year of a person's life or of a particular century

  4. the amount or quantity that is seven times as big as ten

  5. something represented by, representing, or consisting of 70 units

"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

determiner

    1. amounting to seventy

      the seventy varieties of fabric

    2. ( as pronoun )

      to invite seventy to the wedding

"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

Etymology

Origin of seventy

1150–1200; Middle English; Old English seofontig. See seven, -ty 1

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.

A train carrying political prisoners had been stopped and seven, or seventeen, or seventy, had made it away.

From Literature

"It was a wonderful moment," even if seventy percent of the people there were strangers, Michael told Israel's Channel 13.

From Barron's

Given what my contemporaries and I experienced at our school in the seventies - a matter of public record - I am perfectly entitled to believe his accusers as a default.

From BBC

Each of my dogs weighed over seventy pounds.

From Literature

Around us our classmates were guessing, and I thought Serina had it when she pointed out that the professor’s shoes were rhinestone-encrusted cowboy boots, but apparently that was on-trend for the seventies.

From Literature