Invisible Church. Cf. Visible Church at visible, adj. 1c.

An invisible thing, person, or being.

Something which cannot be perceived by the mind or senses; an imperceptible creature, phenomenon, concept, etc.

with plural: An invisible entity.

the invisible, the unseen world; the Deity.

used esp. with direct or implied allusion to H. G. Wells's novel The Invisible Man (1897).