Dictionary.com's Word of the Year is...
Adjective Having green leaves or needles all year. Evergreen trees lose their leaves individually on an ongoing basis, rather than losing all of them in a short period at the end of a growing season in the manner of deciduous trees. Compare deciduous.
Noun An evergreen tree, shrub, or plant, such as the pine, holly, or rhododendron.
: desperately searching the shelf of ''evergreen'' pieces, hoping to find some picture story that we could tie in with what was happeningnoun
[journalism senses so called because such material is perdurably useful]