The word holistic is defined in general terms in the dictionary as the theory that a whole is greater than its parts.
In recent decades the word has come to be used in much more expanded ways as follows:
IN GENERAL - Referring to the concept of a whole person or a person who has synthesized the three major parts of their being, body, mind and soul or spirit.
SPIRITUALLY - Referring to attempting to become a whole person by synthesizing body, mind, and soul or spirit.
MEDICALLY OR IN THE GENERAL HEALING ARTS - General reference to natural, alternative, complimentary, and preventative healing modalities.
IN MINISTRY - Used by metaphysical or non-denominational ministers who specialize in pastoral counseling and/or spiritual healing.