sev·en·ty / ˈsevəntē/ • cardinal number (pl. -ties) the 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) ∎  (seventies) the numbers from seventy to seventy-nine, esp. the years of a century or of a person's life: Dad was now in his seventies. ∎  seventy years old: she was nearly seventy. ∎  seventy miles an hour: doing about seventy.DERIVATIVES: sev·en·ti·eth / -tēə[unvoicedth]/ ordinal numbersev·en·ty·fold / -ˌfōld/ adj. & adv.

seventy traditionally regarded as the natural span of human life (see threescore years and ten).

The Seventy is the name given to the 70 disciples whose mission is recorded in Luke 10:1. It is also used for the interpreters of the Septuagint.