Citta: 'mind', 'consciousness', 'state of consciousness', is a synonym of mano and viññāna see: khandha. Dhs divides all phenomena into consciousness citta mental properties cetasika and materiality rupa.
In adhicitta-sikkha 'higher mentality', it signifies the concentrated, quietened mind, and is one of the 3 trainings see: sikkha The concentration or intensification of consciousness is one of the 4 roads to power see: iddhi-pada.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.