2 occurrences in 2 dictionaries

Reference: Vanity

American

Does not usually denote, in Scripture, self-conceit or personal pride, 2Pe 2:18, but sometimes emptiness and fruitlessness, Job 7:3; Ps 144:4; Ec 1. It often denotes wickedness, particularly falsehood, De 32:21; Ps 4:2; 24:4; 119:37, and sometimes idols and idol-worship, 2Ki 17:15; Jer 2:5; 18:15; Jon 2:8. Compare Paul's expression, "they turned the truth of God into a lie," Ro 1:25. "In vain," in the second commandment, Ex 20:7, is unnecessarily and irreverently. "Vain men," 2Sa 6:20; 2Ch 13:7, are dissolute and worthless fellows.

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Hastings

The root-idea of the word is 'emptiness.' Skeat suggests that the Lat. vanus (perhaps for vac-nus) is allied to vacuus 'empty.' In English literature 'vanity' signifies (1) emptiness, (2) falsity, (3) vainglory. The modern tendency is to confine its use to the last meaning. But 'vanity' in the sense of 'empty conceit' is not found in the English Bible.

1. In the OT.

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