thirties

• (of the decade) 'thirties

thirties

1. plural of thirty

thirties pl (plural only)

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

• 1930s, '30s, 30s

• thirtysomething
• tricenarian

• shittier