'Vanity' in the Bible

For the creation was subjected to vanity, not of its own will, but by reason of him who subjected it, in hope

This I say therefore, and testify in the Lord, that ye no longer walk as the Gentiles also walk, in the vanity of their mind,

For, uttering great swelling words of vanity, they entice in the lusts of the flesh, by lasciviousness, those who are just escaping from them that live in error;