rare. [irreg. formation = apocalypt, or apocalyptist.] A revealer of the unknown; an interpreter of the Apocalypse.
1829. Gen. P. Thompson, Exerc., I. 114. So far the unknown apocalypst has chosen to carry his operations.
1863. Thornbury, True as Steel, III. 148. Help to fill the mad-house as these pretended apocalypsts do.