Source : Webster's Revised Unabridged Dictionary (1913)

Adventist \Ad"vent*ist\, n.
   One of a religious body, embracing several branches, who look
   for the proximate personal coming of Christ; -- called also
   {Second Adventists}. --Schaff-Herzog Encyc.

Source : WordNet®

Adventist
     n : a member of Christian denomination that expects the imminent
         advent of Christ [syn: {Second Adventist}]