Definition: not fake or counterfeit
Usage: a genuine Picasso; genuine leather
Similar words: bona fide, authentic, unquestionable, veritable
Definition: not counterfeit or copied
Usage: an authentic signature; a bona fide manuscript; an unquestionable antique; photographs taken in a veritable bull ring
Similar words: documented, attested, authenticated
Definition: established as genuine
Definition: not forged
Usage: a good dollar bill
Similar words: honest-to-god, honest-to-goodness, sure-enough, old
Definition: (used informally especially for emphasis)
Usage: a real honest-to-god live cowboy; had us a high old time; went upriver to look at a sure-enough fish wheel