forty

(fôrˈtē)

1. The cardinal number equal to 4 × 10.
2. forties
   a. A decade or the numbers from 40 to 49: They stopped smoking in their forties. At night the temperature fell into the forties.
   b. often Forties The decade from 40 to 49 in a century.

Related Forms:

• forˈty adjective & pron.