- that can be believed or accepted; trustworthy; reliable: an authentic news report
- that is in fact as represented; genuine; real: an authentic antique
- legally attested or executed, as a deed, affidavit, etc.
- true to its type; conforming to an original in style, methods, etc.: authentic Japanese cooking
- Obs. authoritative
Origin of authenticMiddle English autentike from Old French autentique from Late Latin authenticus from Classical Greek authentikos, genuine from authent?s, one who does things himself from autos, self + -hent?s from Indo-European base an unverified form sen-, to prepare, achieve