| a. | 1. | 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; |
| 2. | Authoritative. | |
| 3. | Of approved authority; true; trustworthy; credible; | |
| 4. | (Law) Vested with all due formalities, and legally attested. | |
| 5. | (Mus.) 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. | |
| n. | 1. | An original (book or document). |
| Adj. | 1. | authentic - conforming to fact and therefore worthy of belief; "an authentic account by an eyewitness"; "reliable information" Synonyms: reliable |
| 2. | authentic - not counterfeit or copied; "an authentic signature"; "a bona fide manuscript"; "an unquestionable antique"; "photographs taken in a veritable bull ring" |
AUTHENTIC. This term signifies an original of which there is no doubt.
Christian, aboveboard, absolute, accepted, adducible, admissible, approved, attestative, attestive, authoritative, avant-garde, based on, bona fide, candid, canonical, card-carrying, cathedral, certain, circumstantial, cognizable, conclusive, conventional, convincing, creative, credible, cumulative, customary, damning, de facto, decisive, dependable, determinative, dinkum, documentary, documented, evangelical, evidential, evidentiary, ex cathedra, ex parte, eye-witness, fair and square, faithful, final, firm, firsthand, following the letter, for real, founded on, foursquare, fresh, good, good-faith, grounded on, hearsay, historical, honest, honest-to-God, imaginative, implicit, inartificial, incontrovertible, indicative, indisputable, indubitable, irrefutable, irresistible, knowable, lawful, lifelike, literal, magisterial, material, natural, naturalistic, new, novel, nuncupative, of the faith, official, on the level, on the square, on the up-and-up, open, open and aboveboard, original, orthodox, orthodoxical, overwhelming, positive, presumptive, probative, proper, pukka, questionless, realistic, received, recognizable, revolutionary, right, rightful, scriptural, significant, simon-pure, simple, sincere, single-hearted, solid, sound, square, square-dealing, square-shooting, standard, sterling, straight, straight-shooting, substantial, suggestive, sure, sure-enough, symptomatic, telling, textual, traditional, traditionalistic, true to life, true to nature, true to reality, true-blue, trustworthy, trusty, unadulterated, unaffected, unalloyed, unassumed, unassuming, uncolored, unconcocted, uncopied, uncounterfeited, undeniable, underived, undisguised, undisguising, undisputed, undistorted, undoubted, unexaggerated, unfabricated, unfanciful, unfeigned, unfeigning, unfictitious, unflattering, unimagined, unimitated, uninvented, unique, unpretended, unpretending, unqualified, unquestionable, unromantic, unsimulated, unspecious, unsynthetic, unvarnished, up-and-up, valid, verbal, verbatim, veridical, verisimilar, veritable, very, weighty, word-for-word