adeon Share definition Flag Term used to describe anyone who is in the process of owning and/or has owned someone. As a noun, it is one who can be described as above and beyond, or "pro" at life. "That guy we just played is totally adeon, we totally got owned." adeon by Jace P March 11, 2008 0 0 Get merch Get the adeon mug. Buy Now — $32.95 See more merch