Dragon

Boyd’s Bible Dictionary:

(serpent). An animal of the lizard species. Evidently a wild beast, as a jackal (Job 30:2929I am a brother to dragons, and a companion to owls. (Job 30:29); Isa. 34:1313And thorns shall come up in her palaces, nettles and brambles in the fortresses thereof: and it shall be an habitation of dragons, and a court for owls. (Isaiah 34:13); Psa. 44:1919Though thou hast sore broken us in the place of dragons, and covered us with the shadow of death. (Psalm 44:19); Jer. 9:1111And I will make Jerusalem heaps, and a den of dragons; and I will make the cities of Judah desolate, without an inhabitant. (Jeremiah 9:11); Mic. 1:88Therefore I will wail and howl, I will go stripped and naked: I will make a wailing like the dragons, and mourning as the owls. (Micah 1:8)); sea-serpent (Gen. 1:2121And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good. (Genesis 1:21)); land-serpent (Ex. 7:9-129When Pharaoh shall speak unto you, saying, Show a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent. 10And Moses and Aaron went in unto Pharaoh, and they did so as the Lord had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent. 11Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments. 12For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods. (Exodus 7:9‑12); Deut. 32:3333Their wine is the poison of dragons, and the cruel venom of asps. (Deuteronomy 32:33)); devil (Rev. 12:3-173And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. 4And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born. 5And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne. 6And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days. 7And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, 8And prevailed not; neither was their place found any more in heaven. 9And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. 10And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. 11And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death. 12Therefore rejoice, ye heavens, and ye that dwell in them. Woe to the inhabiters of the earth and of the sea! for the devil is come down unto you, having great wrath, because he knoweth that he hath but a short time. 13And when the dragon saw that he was cast unto the earth, he persecuted the woman which brought forth the man child. 14And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent. 15And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood. 16And the earth helped the woman, and the earth opened her mouth, and swallowed up the flood which the dragon cast out of his mouth. 17And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ. (Revelation 12:3‑17)).

Concise Bible Dictionary:

It may signify any great serpent or sea monster, symbolical of a huge destructive creature. Nations doomed to destruction and desolation, including Jerusalem, are said to become habitations of dragons (Isa. 34:1313And thorns shall come up in her palaces, nettles and brambles in the fortresses thereof: and it shall be an habitation of dragons, and a court for owls. (Isaiah 34:13); Isa. 35:77And the parched ground shall become a pool, and the thirsty land springs of water: in the habitation of dragons, where each lay, shall be grass with reeds and rushes. (Isaiah 35:7); Jer. 9:1111And I will make Jerusalem heaps, and a den of dragons; and I will make the cities of Judah desolate, without an inhabitant. (Jeremiah 9:11); Jer. 10:2222Behold, the noise of the bruit is come, and a great commotion out of the north country, to make the cities of Judah desolate, and a den of dragons. (Jeremiah 10:22); Jer. 51:3737And Babylon shall become heaps, a dwellingplace for dragons, an astonishment, and an hissing, without an inhabitant. (Jeremiah 51:37)). Pharaoh, king of Egypt, is called the great dragon (Ezek. 29:33Speak, and say, Thus saith the Lord God; Behold, I am against thee, Pharaoh king of Egypt, the great dragon that lieth in the midst of his rivers, which hath said, My river is mine own, and I have made it for myself. (Ezekiel 29:3)). As one of God’s creatures the dragon is called upon to praise Jehovah (Psa. 148:77Praise the Lord from the earth, ye dragons, and all deeps: (Psalm 148:7)). In the New Testament the dragon is a type of Satan and those energized by him. In Revelation 12:33And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. (Revelation 12:3) the “great red dragon, having seven heads and ten horns,” is symbolical of Satan’s power in the form of the Roman empire: it endeavored, in the person of Herod, to destroy Christ when born. In Revelation 13:2, 42And the beast which I saw was like unto a leopard, and his feet were as the feet of a bear, and his mouth as the mouth of a lion: and the dragon gave him his power, and his seat, and great authority. (Revelation 13:2)
4And they worshipped the dragon which gave power unto the beast: and they worshipped the beast, saying, Who is like unto the beast? who is able to make war with him? (Revelation 13:4) it is Satan who gives the resuscitated Roman empire in a future day its throne and great authority. In Revelation 13:11And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy. (Revelation 13:1)1 The Antichrist, who has two horns like a lamb, speaks as a dragon. In Revelation 16:1313And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet. (Revelation 16:13) it is Satan, and in Revelation 20:22And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years, (Revelation 20:2) he is described as “that old serpent, which is the Devil and Satan.”