- a member of a Roman Catholic religious order (Society of Jesus) founded by Ignatius of Loyola in 1534.
- (often lowercase) a crafty, intriguing, or equivocating person: so called in allusion to the methods ascribed to the order by its opponents.
- of or relating to Jesuits or Jesuitism.
- a member of a Roman Catholic religious order (the Society of Jesus) founded by Saint Ignatius Loyola in 1534 with the aims of defending the papacy and Catholicism against the Reformation and to undertake missionary work among the heathen
- (sometimes not capital) informal, offensive a person given to subtle and equivocating arguments; casuist
1540s, from Modern Latin Jesuita, member of the Society of Jesus, founded 1533 by Ignatius Loyola to combat Protestantism. Their enemies (in both Catholic and Protestant lands) accused them of belief that ends justify means, hence the sense “a dissembling person” (1630s), and jesuitical “deceitful” (1610s).