The Greek noun “εἰκών ”

Found most often in the book of Revelation  (13:14-15; 14:9, 11; 15:2; 16:2; 19:20; 20:4) and used to describe the “image” of a beast which is worshiped, the Greek noun “eikon” has multiple meanings in the New Testament.  This noun describes the “image” on a coin (Mt. 22:20; Mk. 12:16; Lk. 20:24).  Paul spoke about being conformed to the “image” of Jesus (Rom. 8:29).  This term is also used in 1 Cor. 15:49; 2 Cor. 3:18; 4:4; Col. 1:15.  Other definitions for this term include likeness, form, appearance.

Spicq (1:419) said this term “takes on ontological meaning, because the person-image achieves a new spiritual state, we might even say a transformation of his being, which—as a living portrait—will share the glorious condition of the resurrected Son.”