icon (Noun) — Someone or something that is a well-known example of their or its type, or is widely venerated or admired. ex. "Unpublished Marilyn Monroe photos show happy young actress before she was an icon"
icon (Noun) — (computing) a graphic symbol (usually a simple picture) that denotes a program or a command or a data file or a concept in a graphical user interface.
icon (Noun) — A visual representation (of an object, scene, person or abstraction) produced on a surface.
icon (Noun) — A conventional religious painting in oil on a small wooden panel; venerated in the Eastern Church.