Cit is consciousness in its purest form: not the changing contents of the mind, but the awareness in which they appear. For Vedānta it is self-luminous, needing nothing else to reveal it, and it is the nature of both the self and Brahman. The word also appears in Kashmir Śaivism for the supreme consciousness that manifests the world.
Cit
Consciousness: in Vedānta, the pure awareness that is the nature of the self and of Brahman.
Also: Chit