thirties

noun

1. (form-of, plural)plural of thirty
2. (plural, plural-only)The fourth decade of a century: the 1830s, 1930s, 2030s, etc.

   “It says here on your resume that your last job was as a streetcorner apple vendor and that you haven't worked since the thirties.”

   “The Road to Glory, while not the best, was likewise not the least of the thirties films which may justly be called "anti-war" in both intent and execution.”

3. (plural, plural-only)The decade of one's life from age 30 through age 39.

   “He looked to be in his thirties.”

4. (plural, plural-only)The range between 30 and 39.

   “It's going to be in the low thirties tonight.”

adj

1. (not-comparable)From or evoking the 31st through 40th years of a century (chiefly the 1930s).

   “Yearslong droughts? How thirties!”

   “'Something light and airy for this last burst of summer, non?' said Madame, and held up a dress in creamy pink crêpe-de-Chine. 'Very thirties, n'est-ce pas? I adore this fabric—so fluid, so graceful.'”