(1):
(n.) Vested with all due formalities, and legally attested.
(2):
(n.) Having as immediate relation to the tonic, in distinction from plagal, which has a correspondent relation to the dominant in the octave below the tonic.
(3):
(n.) An original (book or document).
(4):
(n.) Of approved authority; true; trustworthy; credible; as, an authentic writer; an authentic portrait; authentic information.
(5):
(n.) Authoritative.
(6):
(n.) Having a genuine original or authority, in opposition to that which is false, fictitious, counterfeit, or apocryphal; being what it purports to be; genuine; not of doubtful origin; real; as, an authentic paper or register.
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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