adj.
- of undisputed origin or veracity; genuine.
- Music (of a church mode) containing notes between the principal note or final and the note an octave higher. Compare with plagal.
Derivative
- authentically adv.
- authenticity
/ɔːθɛnˈtɪsɪti/
n.
Etymology
ME: via OFr. from late L. authenticus, from Gk authentikos ‘principal, genuine’.