What is the meaning of Spiritualist?

One who professes a regard for spiritual things only; one whose employment is of a spiritual character; an ecclesiastic.

One who maintains the philosophic doctrine of spiritualism.

One who practises spiritism (a.k.a. spiritualism); a believer in the possibility of communication with the dead; one who attempts to communicate with the dead.

Pertaining to spiritualism; spiritualistic.

Spiritualist (dissident Christian stressing communion with the Holy Spirit and moral improvement through sanctification while rejecting the outwardly church, without necessarily separating from the Roman Catholic Church)

spiritualist

Source: wiktionary.org