forties

/F AO1 R T IY0 Z/
noun
  1. 1

    The decade of the 1840s, 1940s, etc.

  2. 2

    The decade of one's life from age 40 through age 49.

    โ€œThey're both in their forties.โ€

  3. 3

    (temperature, rates) The range between 40 and 49.

    โ€œWhat to wear when the weather is in the forties really depends on whether you're talking fahrenheit or celsius.โ€

Synonyms

adjective
  1. 1

    From or evoking the 41st through 50th years of a century (chiefly the 1940s).

    โ€œTwo forties aircraft sat forgotten in the hangar until they were rediscovered by two trespassing teens.โ€

noun
  1. 1

    A bottle of beer containing forty fluid ounces.

Source: https://en.wiktionary.org/wiki/forties, https://en.wiktionary.org/wiki/forty