- the doctrinal system of Cornelis Jansen and his followers, denying free will and maintaining that human nature is corrupt and that Christ died for the elect and not for all humanity.
- RC Church the doctrine of the Cornelis Jansen and his disciples, who maintained that salvation was limited to those subject to a supernatural determinism, the rest being destined to perdition
- the religious movement arising from these doctrines
1650s, in reference to doctrine of Cornelius Jansen (1585-1638), Catholic bishop of Ypres, who maintained the perverseness and inability for good of the natural human will. Related: Jansenist.