There are many definitions in the Bible for false prophets, some more complete than others. The most complete in one chapter anyhow, is in II Peter...
False prophets must be identified, and shunned. The last days are upon us, and we cannot afford to stray from the truth of God's Word.
Peter gives us some characteristics of false prophets, to help us of the last days identify the ones who the devil is using to lead us from the way God has planned for His people.
2 Peter 2:1-19 (KJV)
1 But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.
2 And many shall follow their pernicious ways; by reason of whom the way of truth shall be evil spoken of.
3 And through covetousness shall they with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not.
4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
5 And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly;
6 And turning the cities of Sodom and Gomorrha into ashes condemned them with an overthrow, making them an ensample unto those that after should live ungodly;
7 And delivered just Lot, vexed with the filthy conversation of the wicked:
8 (For that righteous man dwelling among them, in seeing and hearing, vexed his righteous soul from day to day with their unlawful deeds)
9 The Lord knoweth how to deliver the godly out of temptations, and to reserve the unjust unto the day of judgment to be punished:
10 But chiefly them that walk after the flesh in the lust of uncleanness, and despise government. Presumptuous are they, selfwilled, they are not afraid to speak evil of dignities.
11 Whereas angels, which are greater in power and might, bring not railing accusation against them before the Lord.
12 But these, as natural brute beasts, made to be taken and destroyed, speak evil of the things that they understand not; and shall utterly perish in their own corruption;
13 And shall receive the reward of unrighteousness, as they that count it pleasure to riot in the day time. Spots they are and blemishes, sporting themselves with their own deceivings while they feast with you;
14 Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children:
15 Which have forsaken the right way, and are gone astray, following the way of Balaam the son of Bosor, who loved the wages of unrighteousness;
16 But was rebuked for his iniquity: the dumb ass speaking with man's voice forbad the madness of the prophet.
17 These are wells without water, clouds that are carried with a tempest; to whom the mist of darkness is reserved for ever.
18 For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error.
19 While they promise them liberty, they themselves are the servants of corruption: for of whom a man is overcome, of the same is he brought in bondage.
Note that these false prophets are SUBTLE.
It says: "who privily", which is the word "pareisazousin" meaning "to introduce subtly, stealthily." It is in the future tense, which indicates the continuing action. So these false prophets will secretly introduce heresies that are damnable, destructive ideas and doctrines. They follow the soft-sell, subtle pitch. They follow the example of Satan in the garden to Eve. They quietly come and try to sell a doctrine, that if believed, will damn the soul.
The false prophets are SENSUAL.
The Bible calls this "PERNICIOUS WAYS". They pursue the lusts of the flesh. They have low moral standards. They have much love for selves, and for certain friends and family, but do not have the same love for the "down and outers," or for the wayward, rebellious, etc. Christians who follow, and support such false teachers do great harm to the cause of Christ. When these false prophets are caught in their lustful ways, the cause of Christ suffers reproach and shame. Peter says they are trapped in the "LUST OF UNCLEANNESS", and that they have "EYES FULL OF ADULTERY." Today we live in a time when some churches are considering changing their teachings on pre-marital sex, extra-marital sex, perversions, and sodomy. These standards that the Bible has taught have not changed or become outdated. The false prophets of today would have people to think that we have outdated old-fashioned morality of the commandments of God. Beware these teachings that attempt to cater to the lusts of the flesh.
The false prophets are marked by GREED.
The Bible says: "through covetousness", which comes from the word -"pleonexia". This means - "one eager to have more, especially of that which belongs to others." It also says that they will "MAKE MERCHANDISE OF YOU..." This is from the Greek - "emporeusontai." This means "to exploit, deceive for one's own advantage." False prophets will treat people as personal property, seeking to drain every bit of finance from them. Peter says that they will do such "WITH FEIGNED WORDS", (Greek, "plastois logois") These are false words, well-turned words, slick tongued words that cause people to part with their money believing that they are not serving Christ properly unless they give to this false prophet. Peter cites the example of Balaam in the Old Testament (Numbers 22-31), who had a strong desire for personal gain. He wanted money so much that he almost cursed God's people in order to get wealth.
These false prophets "DESPISE AUTHORITY."
This is the word - "katphroneo" - which means "to despise, to disregard. False prophets are the ones who disregard the true teachings. They can omit huge portions of Scripture, with all its teachings and commandments with ease. Beware any new teachings that replace sound Scriptural teachings.
The false prophets are described by Peter as "SELF WILLED."
This is the Greek word - "authades," which means self-pleasing. False teachers are self pleasers. They want their own will. They cannot pray as Christ, "NOT MY WILL, BUT THINE BE DONE..." They are willing to twist and reshape the Word of God, to get it to say what they want it to say. Test any new teaching by the Word of God.
Another trait of false prophets is their DARING.
They are "NOT AFRAID TO SPEAK EVIL OF DIGNITIES." False prophets will speak evil of many, and criticize many. They will despise those who teach the truth, and encourage others to also despise them. When names are mentioned in ridicule and criticism, be very careful to check out the Scriptures. Beware of ministers who can use God, and His ways, and His servants in stories of ridicule, and criticism.
The words of the false prophets are MEANINGLESS.
Peter says that the false prophets of the last days will "SPEAK GREAT SWELLING WORDS OF VANITY." He says that they are "SPRINGS WITHOUT WATER." Of what value is a spring without water? In the same way, the messages of false prophets are valueless. They may tell you how to get rich, get more money than you can spend, etc, but the Bible tells us that even if we had all the money of the world, and had not eternal life, we profit nothing. The Bible tells us not to be concerned with laying up treasures here on the earth, but to lay up treasures in heaven. So a sermon on how to serve God and give to the needy, sick, and troubled is worth many thousands of sermons on how to get, be rich, and prosper financially. We had better learn how to prosper spiritually in these last days.
The false prophets of the last days are DISHONEST.
Peter says that "WHILE THEY PROMISE THEM LIBERTY, THEY THEMSELVES ARE SERVANTS OF CORRUPTION." False prophets promise real freedom, but they aren't free from sin and its bondage themselves. They promise what they can't deliver. They are servants of sin.