70s noun[plural only]2 •A range of the numbers seventy (70) to seventy-nine (79).Many of his friends are joining a burgeoning international community of elderweds, or those who marry in their 60s, 70s or even 80s. — 2002 •The decade of the 1970s.“Such templates I heard only in the 70s and 80s — extreme nonprofessionalism and surprisingly visible censorship. — 2007
