'Vanity' in the Bible

All the nations are as nothing before him; they are accounted by him as less than nothing, and vanity.

that bringeth princes to nothing; that maketh the judges of the earth as vanity.

Behold, all of them, their works are vanity and nought; their molten images are wind and confusion.

They that fashion a graven image are all of them vanity; and the things that they delight in shall not profit; and their own witnesses see not, nor know: that they may be put to shame.

But I said, I have labored in vain, I have spent my strength for nought and vanity; yet surely the justice due to me is with Jehovah, and my recompense with my God.

None sueth in righteousness, and none pleadeth in truth: they trust in vanity, and speak lies; they conceive mischief, and bring forth iniquity.