Definition:
εἴδωλον, -ου, τό (εἶδος), [in LXX for אֱלוֹהָּ, גְּלוּלִים, etc;] 1) in cl. (a) a phantom, image, likeness; (b) an image in the mind, an idea, fancy. 2) In LXX and NT, (a) an image of a god, an idol (cf. Polyb, xxxi, 3, 13): Act.7:41, 1Co.12:2, Rev.9:20; (b) the false god or idol worshipped in an image (ICC, on I Th, l.with): Act.15:20, Rom.2:22, 1Co.8:4, 7 10:19 2Co.6:18, 1Th.1:9, 1Jn.5:21. (AS)