Definition: A tree or shrubbery that never produces green leaves.
This one came from a ten-year-old pointing out that the opposite of an evergreen tree must be a nevergreen, or in other words, it must be a tree with non-green leaves. Like a Japanese red maple tree, like this one here:
Yup, that's definitely a nevergreen tree. Though it's not only tree's with leaves of a greenless variety that qualify as nevergreens. Dead trees do too. From the mouths of babes people, from the mouths of babes.