Source : Webster's Revised Unabridged Dictionary (1913)

Evergreen \Ev"er*green\a. (Bot.)
   Remaining unwithered through the winter, or retaining
   unwithered leaves until the leaves of the next year are
   expanded, as pines cedars, hemlocks, and the like.

Evergreen \Ev"er*green\, n.
   1. (Bot.) An evergreen plant.

   2. pl. Twigs and branches of evergreen plants used for
      decoration. ``The funeral evengreens entwine.'' --Keble.

Source : WordNet®

evergreen
     n : a plant having foliage that persists and remains green
         throughout the year [syn: {evergreen plant}] [ant: {deciduous
         plant}]

evergreen
     adj : (of plants and shrubs) bearing foliage throughout the year
           [ant: {deciduous}]