n A religious painting, often done on wooden panels.
n A person or thing that is the best example of a certain profession or some doing.
n A small picture which represents something (such as an icon on a computer screen which when clicked performs some function.)
n (linguistics) A type of noun whereby the form reflects and is determined by the referent; onomatopoeic words are necessarily all icons. See also (term|symbol) and (term|index).
n Pictual representations of files, programs and folders on a computer.