identity

n. individuality, personality, qualities which identify a person or thing; sameness; likeness, similarity

Identity may refer to:PhilosophyIdentity (philosophy), the sameness of two thingsIdentity theory of mind, in the philosophy of mind, holds that the mind is identical to the brainPersonal identity (philosophy)Identity (social science)Identity formationLaw of identity, a principle of logic
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Identity /iden·ti·ty/ the aggregate of characteristics by which an individual is recognized by himself and others. [more]Identity - Community and Resources

Noun
1. the distinct personality of an individual regarded as a persisting entity; "you can lose your identity when you join the army"
(synonym) personal identity, individuality
(hypernym) personality
(hyponym) gender identity
(derivation) identify, place
2. the individual characteristics by which a thing or person is recognized or known; "geneticists only recently discovered the identity of the gene that causes it"; "it was too dark to determine his identity"; "she guessed the identity of his lover"
(hypernym) recognition, identification
(derivation) name, identify
3. an operator that leaves unchanged the element on which it operates; "the identity under numerical multiplication is 1"
(synonym) identity element, identity operator
(hypernym) operator
4. exact sameness; "they shared an identity of interests"
(synonym) identicalness, indistinguishability
(hypernym) sameness
(hyponym) oneness, unity
(derivation) identify

(n.)
The state or quality of being identical, or the same; sameness.
  

(n.)
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.
  

(n.)
An identical equation.