Depending on the source, the definition of "psychic" will vary. We've looked at the major online dictionaries and found the following:
lying outside the sphere of physical science or knowledge : immaterial, moral, or spiritual in origin or force
sensitive to nonphysical or supernatural forces and influences : marked by extraordinary or mysterious sensitivity, perception, or understanding
source: Merriman Webster
1. of or relating to the human soul or mind; mental (opposed to physical ).
2. Psychology. pertaining to or noting mental phenomena.
3. outside of natural or scientific knowledge; spiritual.
4.of or relating to some apparently nonphysical force or agency:
psychic research; psychic phenomena.
5.sensitive to influences or forces of a nonphysical or supernatural nature.