also ikon, 1570s, "image, figure, representation," from Late Latin icon, from Greek eikon "likeness, image, portrait," related to eikenai "be like, look like," of unknown origin. Eastern Church sense is attested from 1833. Computing sense first recorded 1982.
An image used in worship in the Eastern Orthodox Church and among other Christians of similar traditions. Icons depict Jesus, Mary, and the saints, usually in a severe, symbolic, nonrealistic way.