i·den·ti·ty

– noun
1. the state or fact of remaining the same one or ones, as under varying aspects or conditions.
2. the condition of being oneself or itself, and not another.
3. condition or character as to who a person or what a thing is.
4. the state or fact of being the same one as described.
5. the sense of self, providing sameness and continuity in personality over time and sometimes disturbed in mental illnesses, as schizophrenia.
6. exact likeness in nature or qualities.
7. an instance or point of sameness or likeness.
8. an assertion that two terms refer to the same thing.
9. an interesting, famous, or eccentric resident, usually of long standing in a community.

in·di·vid·u·al

– noun
1. a single human being, as distinguished from a group.
2. a person.
3. a distinct, indivisible entity; a single thing, being, instance, or item.
4. a group considered as a unit.
5. a. a single organism capable of independent existence.
b. a member of a compound organism or colony.
–adj.
6. single; particular; separate.
7. intended for the use of one person only.
8. of, pertaining to, or characteristic of a particular person or thing.
9. distinguished by special, singular, or markedly personal characteristics; exhibiting unique or unusual qualities.
10. existing as a distinct, indivisible entity, or considered as such; discrete.
11. of which each is different or of a different design from the others.

en·ti·ty

– noun
1. something that has a real existence; thing.
2. being or existence, esp. when considered as distinct, independent, or self-contained.
3. essential nature.