Definition of "sixties"

sixties

noun
1. plural of sixty
noun
plural only
1. Alternative letter-case form of Sixties (The decade of the 1860s, 1960s, etc.)
2. The decade of one's life from age 60 through age 69.
3. (temperature, rates, plural only) The range between 60 and 69.
adjective
not comparable
1. From or evoking the 61st through 70th years of a century (chiefly the 1960s).
  Quotations
  Historians do not rely on single bits of evidence, but are always seeking corroboration, qualification, correction. These novels, set in context, are in themselves interesting fragments of sixties culture.
  1993, Arthur Marwick, “Six Novels of the Sixties — Three French, Three Italian”, in Journal of Contemporary History, volume 28, number 4, page 588