Reference: Daemon
Easton
the Greek form, rendered "devil" in the Authorized Version of the New Testament. Daemons are spoken of as spiritual beings (Mt 8:16; 10:1; 12:43-45) at enmity with God, and as having a certain power over man (Jas 2:19; Re 16:14). They recognize our Lord as the Son of God (Mt 8:20; Lu 4:41). They belong to the number of those angels that "kept not their first estate," "unclean spirits," "fallen angels," the angels of the devil (Mt 25:41; Re 12:7-9). They are the "principalities and powers" against which we must "wrestle" (Eph 6:12).
See Verses Found in Dictionary
When evening came they brought many persons who were dominated by evil spirits to Jesus and He drove out the spirits with [just] a word and healed all those who were sick.
Jesus replied to him, "The foxes have dens [in which to live] and the birds of the sky have nests [in which to roost]; but the Son of man does not have anywhere to lay His head."
Jesus then called His twelve apostles [see next verse] to Him and gave them authority to drive out evil spirits and to heal all kinds of diseases and illnesses.
But when an evil spirit has been driven out of a person, it roams through desert regions trying to find rest but cannot find it. Then it says [to itself], I will return to my house which I came out of [i.e., the body of the person it dominated]. But when it returns [to that body] it finds it empty, cleaned out and [newly] decorated. read more. Then it goes and takes with it seven other spirits, more evil than itself, and they reenter [the body] and [begin to] live there, so that the latter state of that person becomes worse than the former [state]. It will be the same way with the people of this evil generation."
Then He [i.e., the King] will say to those at His left side, 'Go away from me, you who are cursed [by God], into the never ending fire which is prepared for the devil and his angels.
And evil spirits also came out of many people, shouting [at Him], "You are the Son of God." And Jesus spoke sternly to them and would not allow them to speak [anymore] because they knew He was the Christ [Note: Jesus would not accept the endorsement of these Satanic spirits].
For our struggle is not [actually] against human beings, but against rulers and authorities and leaders of this world's darkness, and against the spiritual forces of evil in the heavenly realms. [Note: "Heavenly realms" here refers to the struggle against Satanic powers which permeates life around us].
You believe that there is [only] one God; that is good! Even the demons believe [that], and they shudder [with fear at the thought].
Then there was a war in heaven. Michael [See Dan. 10:13; 12:1; Jude 9] and his angels waged war against the dragon [See verse 9]; and the dragon and his angels fought back. But they did not win and so lost their place in heaven. read more. Then the great dragon was thrown out [of heaven]; he is the snake from ancient times who is [also] called "the Devil," and "Satan," the deceiver of the entire world. He was thrown down to earth along with his angels.
For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.