Definition of "thirties" in English

noun

1. plural of thirty

noun

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

   • 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.

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

   • He looked to be in his thirties.

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

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

adjective

1. From or evoking the 31st through 40th years of a century (chiefly the 1930s).

   • Yearslong droughts? How thirties!