Terminism is the Christian doctrine that there is a time limit for repentance from sin, after which God no longer wills the conversion and salvation of that person.
This limit is asserted to be known to God alone, making conversion urgent.
Terminism in salvation is also mentioned in Max Weber's famous sociological work The Protestant Ethic and the Spirit of Capitalism.
Weber offers in the same paragraph that terminism is "generally (though unjustly) attributed to Pietism by its opponents".
Terminism is defined by rhetorician Walter J. Ong, who links it to nominalism, as "a concomitant of the highly quantified formal logic of medieval scholastic philosophy, and thus contrasts with theology which had closer connections with metaphysics and special commitments to rhetoric" (135).