reversionist noun 3adjective 1forms 3 noun3 •One who clings to previous patterns of behavior or thought, rejecting social or cultural change.The right-wing Reversionist focuses on a small town past where law, order and predictability prevail. — 1983 •The person to whom a property reverts when a freehold expires. •One who has lost faith; a heathen, nonbeliever, or apostate.But for the reversionist the indwelling of Christ has no effect. — 2011 adjective1 •Pertaining to or characteristic of reversionists.Certain fringe ecologists are quite as reversionist in their thinking, and reach even farther back for their image of the good life. — 1975 formsreversionists · more reversionist · most reversionist