30s

• '30s
• 30's

30s pl (plural only)

1. The decade of the 1930s.

   Synonyms: 1930s, thirties

2. Temperatures from 30 to 39 degrees.
3. Ages from 30 to 39.

   He’s in his 30s.

   • 2007 May 13, “Natalie Lui, Stephen Duncan”, in The New York Times‎^[1], archived from the original on 26 November 2022:

     The men I met in California who were in their 30s and superambitious never really valued women, but Stephen valued me as a person.”

4. The numbers from 30 to 39.

   Casualties numbered in the 30s.