authentic

adj

1. Of the same origin as claimed; genuine.

   “The experts confirmed it was an authentic signature.”

2. Conforming to reality and therefore worthy of trust, reliance, or belief.

   “an authentic writer; an authentic portrait; authentic information”

   “The report was completely authentic.”

3. Designating a mode having the final as the lowest note.
4. Designating a cadence in which the dominant chord precedes the tonic.
5. (obsolete)Authoritative.

   “[T]here they find Ignatius, and then they beleeve him not for his ovvn Authority, but for a truths ſake, vvhich they derive from elſ vvhere: to vvhat end then ſhould they cite him as authentick for Epiſcopacie, vvhen they cannot knovv vvhat is authentick in him, but by the judgement vvhich they brought vvith them, and not by any judgement vvhich they might ſafely learne from him.”