(1):
(superl.) Destitute of forge or efficacy; effecting no purpose; fruitless; ineffectual; as, vain toil; a vain attempt.
(2):
(superl.) Showy; ostentatious.
(3):
(n.) Vanity; emptiness; - now used only in the phrase in vain.
(4):
(superl.) Having no real substance, value, or importance; empty; void; worthless; unsatisfying.
(5):
(superl.) Proud of petty things, or of trifling attainments; having a high opinion of one's own accomplishments with slight reason; conceited; puffed up; inflated.
A timeless resource no serious scholar should be without. With more than 75,000 entries, if it is a word used in the Bible, you are sure to find it defined here.Wikipedia
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