(also ‘Second Adventist’; plural: ‘Adventists‘)
a person who believes in the second coming of Jesus Christ and advocates the belief that the end of this world is very near;
a person belonging to the Seventh-day Advent Church (= a denomination/group in Christian religion)
The Adventist Review, a semi-official magazine of the Seventh-day Adventist Church, is read by most of the Adventists.
Adventist Forum, AF in short, is an international non-profit organisation of the Adventists.