authenticity
//ˌɔː.θenˈtɪs.ɪ.ti//
Noun
authenticitySingular
1
The quality of being genuine, real, or true to its origin rather than a copy or imitation.
Experts confirmed the authenticity of the ancient painting.
2
The quality of being true to one's own personality, spirit, or character; sincerity and honesty in self-expression.
She admired his authenticity and the way he always stayed true to himself.
3
The degree to which something accurately represents or conforms to an original, especially in historical or cultural contexts.
Historians questioned the authenticity of the ancient manuscript.