thirties

noun
  1. 1

    A decade starting with the year xx30, most usually the decade from 1930 to 1939.

  2. 2

    The decade of one's life from age 30 through age 39.

    โ€œHe looked to be in his thirties.โ€

  3. 3

    (temperature, rates) The range between 30 and 39.

Synonyms

noun
  1. 1

    A rack of thirty beers.

Source: https://en.wiktionary.org/wiki/thirties, https://en.wiktionary.org/wiki/thirty