The act of seeing someone else's screen and all of their online activities. This can only be done when both users have a Mac. A screen share is usually a bad thing, as you can essentially take over someone's screen and "creep" on them.
My teacher who introduced me to witchcraft, new age spirituality, reiki, and occultism did a spiritual journey where we tapped into each other's minds. It was like screen share of the mind.