(a.) Full of use, advantage, or profit; producing, or having power to produce, good; serviceable for any end or object; helpful toward advancing any purpose; beneficial; profitable; advantageous; as, vessels and instruments useful in a family; books useful for improvement; useful knowledge; useful arts.
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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