/kwod'reuh jeuh nair"ee euhn/ , adj.
1. 40 years of age.
2. between the ages of 40 and 50.
n.
3. a person who is 40 years old or whose age falls between 40 and 50.
[ 1830-40; quadragenari ( us ) consisting of forty ( quadragen ( i ) forty each + -arius -ARY) + -AN ]