(meat, thing that is) offered (in sacrifice, sacrificed) to (unto) idols

Boyd’s Bible Dictionary:

(apparent). An object of worship, other than God (Gen. 31:1919And Laban went to shear his sheep: and Rachel had stolen the images that were her father's. (Genesis 31:19)); idolatry forbidden (Ex. 20:3-4; 34:133Thou shalt have no other gods before me. 4Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: (Exodus 20:3‑4)
13But ye shall destroy their altars, break their images, and cut down their groves: (Exodus 34:13); Deut. 4:16-19; 7:25-2616Lest ye corrupt yourselves, and make you a graven image, the similitude of any figure, the likeness of male or female, 17The likeness of any beast that is on the earth, the likeness of any winged fowl that flieth in the air, 18The likeness of any thing that creepeth on the ground, the likeness of any fish that is in the waters beneath the earth: 19And lest thou lift up thine eyes unto heaven, and when thou seest the sun, and the moon, and the stars, even all the host of heaven, shouldest be driven to worship them, and serve them, which the Lord thy God hath divided unto all nations under the whole heaven. (Deuteronomy 4:16‑19)
25The graven images of their gods shall ye burn with fire: thou shalt not desire the silver or gold that is on them, nor take it unto thee, lest thou be snared therein: for it is an abomination to the Lord thy God. 26Neither shalt thou bring an abomination into thine house, lest thou be a cursed thing like it: but thou shalt utterly detest it, and thou shalt utterly abhor it; for it is a cursed thing. (Deuteronomy 7:25‑26)); yet existed largely, especially under the judges and later kings (Ex. 32; Judg. 2:10-2310And also all that generation were gathered unto their fathers: and there arose another generation after them, which knew not the Lord, nor yet the works which he had done for Israel. 11And the children of Israel did evil in the sight of the Lord, and served Baalim: 12And they forsook the Lord God of their fathers, which brought them out of the land of Egypt, and followed other gods, of the gods of the people that were round about them, and bowed themselves unto them, and provoked the Lord to anger. 13And they forsook the Lord, and served Baal and Ashtaroth. 14And the anger of the Lord was hot against Israel, and he delivered them into the hands of spoilers that spoiled them, and he sold them into the hands of their enemies round about, so that they could not any longer stand before their enemies. 15Whithersoever they went out, the hand of the Lord was against them for evil, as the Lord had said, and as the Lord had sworn unto them: and they were greatly distressed. 16Nevertheless the Lord raised up judges, which delivered them out of the hand of those that spoiled them. 17And yet they would not hearken unto their judges, but they went a whoring after other gods, and bowed themselves unto them: they turned quickly out of the way which their fathers walked in, obeying the commandments of the Lord; but they did not so. 18And when the Lord raised them up judges, then the Lord was with the judge, and delivered them out of the hand of their enemies all the days of the judge: for it repented the Lord because of their groanings by reason of them that oppressed them and vexed them. 19And it came to pass, when the judge was dead, that they returned, and corrupted themselves more than their fathers, in following other gods to serve them, and to bow down unto them; they ceased not from their own doings, nor from their stubborn way. 20And the anger of the Lord was hot against Israel; and he said, Because that this people hath transgressed my covenant which I commanded their fathers, and have not hearkened unto my voice; 21I also will not henceforth drive out any from before them of the nations which Joshua left when he died: 22That through them I may prove Israel, whether they will keep the way of the Lord to walk therein, as their fathers did keep it, or not. 23Therefore the Lord left those nations, without driving them out hastily; neither delivered he them into the hand of Joshua. (Judges 2:10‑23); 1 Kings 11:33; 12:27-33; 14:22-2433Because that they have forsaken me, and have worshipped Ashtoreth the goddess of the Zidonians, Chemosh the god of the Moabites, and Milcom the god of the children of Ammon, and have not walked in my ways, to do that which is right in mine eyes, and to keep my statutes and my judgments, as did David his father. (1 Kings 11:33)
27If this people go up to do sacrifice in the house of the Lord at Jerusalem, then shall the heart of this people turn again unto their lord, even unto Rehoboam king of Judah, and they shall kill me, and go again to Rehoboam king of Judah. 28Whereupon the king took counsel, and made two calves of gold, and said unto them, It is too much for you to go up to Jerusalem: behold thy gods, O Israel, which brought thee up out of the land of Egypt. 29And he set the one in Beth-el, and the other put he in Dan. 30And this thing became a sin: for the people went to worship before the one, even unto Dan. 31And he made an house of high places, and made priests of the lowest of the people, which were not of the sons of Levi. 32And Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like unto the feast that is in Judah, and he offered upon the altar. So did he in Beth-el, sacrificing unto the calves that he had made: and he placed in Beth-el the priests of the high places which he had made. 33So he offered upon the altar which he had made in Beth-el the fifteenth day of the eighth month, even in the month which he had devised of his own heart; and ordained a feast unto the children of Israel: and he offered upon the altar, and burnt incense. (1 Kings 12:27‑33)
22And Judah did evil in the sight of the Lord, and they provoked him to jealousy with their sins which they had committed, above all that their fathers had done. 23For they also built them high places, and images, and groves, on every high hill, and under every green tree. 24And there were also sodomites in the land: and they did according to all the abominations of the nations which the Lord cast out before the children of Israel. (1 Kings 14:22‑24); Isa. 57:5-85Enflaming yourselves with idols under every green tree, slaying the children in the valleys under the clifts of the rocks? 6Among the smooth stones of the stream is thy portion; they, they are thy lot: even to them hast thou poured a drink offering, thou hast offered a meat offering. Should I receive comfort in these? 7Upon a lofty and high mountain hast thou set thy bed: even thither wentest thou up to offer sacrifice. 8Behind the doors also and the posts hast thou set up thy remembrance: for thou hast discovered thyself to another than me, and art gone up; thou hast enlarged thy bed, and made thee a covenant with them; thou lovedst their bed where thou sawest it. (Isaiah 57:5‑8)).

Strong’s Dictionary of Greek Words:

Number:
1494 (find all occurrences in KJV Bible)
Greek:
εἰδωλόθυτον
Transliteration:
eidolothuton
Phonic:
i-do-loth’-oo-ton
Meaning:
neuter of a compound of 1497 and a presumed derivative of 2380; an image-sacrifice, i.e. part of an idolatrous offering
KJV Usage:
(meat, thing that is) offered (in sacrifice, sacrificed) to (unto) idols