'Vanity' in the Bible

thus saith Jehovah, What unrighteousness have your fathers found in me, that they are gone far from me, and have walked after vanity, and are become vain?

For the customs of the peoples are vanity; for one cutteth a tree out of the forest, the work of the hands of the workman with the axe.

They are vanity, a work of delusion: in the time of their visitation they shall perish.

O Jehovah, my strength, and my stronghold, and my refuge in the day of affliction, unto thee shall the nations come from the ends of the earth, and shall say, Our fathers have inherited nought but lies, even vanity and things wherein there is no profit.

Thus saith Jehovah of hosts, Hearken not unto the words of the prophets that prophesy unto you: they teach you vanity; they speak a vision of their own heart, and not out of the mouth of Jehovah.

They are vanity, a work of delusion: in the time of their visitation they shall perish.

Thus saith Jehovah of hosts: The broad walls of Babylon shall be utterly overthrown, and her high gates shall be burned with fire; and the peoples shall labor for vanity, and the nations for the fire; and they shall be weary.