'Second Death' in the Bible

Let the one having ears, hear what the Spirit says to the churches; The one conquering can never be hurt by the second death.

Blessed and holy is the one having part in the first resurrection: over these the second death has no authority, but they shall be priests of God and of Christ, and shall reign with him a thousand years.

And death and Hades were cast into the lake of fire. This is the second death, the lake of fire.

But to the cowardly, and unbelieving, and the abominable, and the murderers, and the fornicators, and the sorcerers, and the idolaters, and all liars, shall be their part in the lake which burns with fire and brimstone, which is the second death.