What is heaven?

[Polaris]

heav·en
   [hev-uhn]

noun
1. the abode of God, the angels, and the spirits of the righteous after death; the place or state of existence of the blessed after the mortal life.

2. ( initial capital letter ) Often, Heavens. the celestial powers; God.

3. a metonym for God (used in expressions of emphasis, surprise, etc.): For heaven's sake!

4. heavens,
a. (used interjectionally to express emphasis, surprise, etc.): Heavens, what a cold room!

b. ( used with a singular verb ) a wooden roof or canopy over the outer stage of an Elizabethan theater.

5. Usually, heavens. the sky, firmament, or expanse of space surrounding the earth.

And this answers...nothing. There is never a specific definition given in the bible. Why not? Is it because some people might decide they don't like it?

Revelations 21

Then I saw “a new heaven and a new earth,”for the first heaven and the first earth had passed away, and there was no longer any sea. 2 I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband. 3 And I heard a loud voice from the throne saying, “Look! God’s dwelling place is now among the people, and he will dwell with them. They will be his people, and God himself will be with them and be their God. 4 ‘He will wipe every tear from their eyes. There will be no more death’ or mourning or crying or pain, for the old order of things has passed away.”

Revelations 22

"Then the angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb 2 down the middle of the great street of the city. On each side of the river stood the tree of life, bearing twelve crops of fruit, yielding its fruit every month. And the leaves of the tree are for the healing of the nations. 3 No longer will there be any curse. The throne of God and of the Lamb will be in the city, and his servants will serve him. 4 They will see his face, and his name will be on their foreheads. 5 There will be no more night. They will not need the light of a lamp or the light of the sun, for the Lord God will give them light. And they will reign for ever and ever."

There are many theologians who believe that there really is no concept of heaven at the present and that all believers are waiting for the Day of Judgement for all things to pass.