Identity
Identity , noun
[French identité, Late Latin identitas, from Latin idem the same, from the root of is he, that; compare Sanskrit idam this. Compare Item.]
1.
The state or quality of being identical, or the same; sameness.
Identity is a relation between our cognitions of a thing, not between things themselves.
2.
The condition of being the same with something described or asserted, or of possessing a character claimed; as, to establish the identity of stolen goods.
3.
(Mathematics) An identical equation.