Dictionary.com
definitions

preterist

[pret-er-ist]Theology

noun

a person who maintains that the prophecies in the Apocalypse have already been fulfilled.Compare futurist(def 2), presentist.

adjective

of or relating to the preterists.

Origin of preterist

First recorded in 1960–65; preter- + -ist
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for preterist
n.

"one who favors the past," 1864 (as a theological term from 1843, "one who holds that the Apocalyptic prophecies have begun to be fulfilled"), from preter- + -ist.

Online Etymology Dictionary, © 2010 Douglas Harper