Gĕn'ū-ine-ness, n.

n. The state or quality of being genuine; not altered or corrupted; not forged or substituted; purity; reality; sincerity; as, the genuineness of Livy's History; the genuineness of faith or repentance.

The evidence, both internal and external, against the genuineness of these letters, is overwhelming. Macaulay.