名詞 identity:

1. the distinct personality of an individual regarded as a persisting entity
   同義詞：personal identity, individuality
2. the individual characteristics by which a thing or person is recognized or known
3. an operator that leaves unchanged the element on which it operates
   同義詞：identity element, identity operator
4. exact sameness
   同義詞：identicalness, indistinguishability

1. The net result of the long police investigation is that the identity of the killer is still a complete mystery.
   警方經(jīng)長時間調(diào)查，結(jié)果兇手的身分仍全然不知。
2. The journalist did not want to reveal the identity of his informant.
   那個新聞工作者不想透露消息提供人的身分。
3. A credit card is not a valid proof of identity.
   銀行發(fā)的支票保付卡不是有效的身份證明文件。
4. She experienced a loss of identity after giving up her career to get married.
   她放棄職業(yè)結(jié)婚以后有一種失落感。
5. The police asked him to show his identity card.
   警察讓他出示身份證。
6. The identity of the murdered man has not yet been established.
   那名被害人的身份尚未確定。

i.den.ti.ty

n.（名詞）
【復數(shù)】 i.den.ti.ties
The collective aspect of the set of characteristics by which a thing is definitively recognizable or known:
身份，特征：從本質(zhì)上確認或識別某物的一系列特征的總和：
例句：
.If the broadcast group is the financial guts of the company, the news division is its public identity.(Bill Powell)
.如果說播音小組是公司財物的核心，那么新聞部就是它的公共象征.(比爾·鮑威爾)

The set of behavioral or personal characteristics by which an individual is recognizable as a member of a group.
個人身份：個人作為一個集團的成員所具有的行為或本身特點
The quality or condition of being the same as something else.
同一性：同另一事物相同的性質(zhì)或狀態(tài)
The distinct personality of an individual regarded as a persisting entity; individuality.
個性，特性：個人具有的長期以實體形式存在的獨特性格；個性
Mathematics
【數(shù)學】
An equation that is satisfied by any number that replaces the letter for which the equation is defined.
單位（矩）陣：定義式中的字母對任一數(shù)字都使恒等式成立的恒等式
Identity element.
單位元素，幺元

來源：
French identité
法語 identité
from Old French identite
源自 古法語 identite
from Late Latin identit3s
源自 后期拉丁語 identit3s
from Latin idem [the same] influenced by Late Latin essentit3s [being,] identidem [repeatedly]
源自 拉丁語 idem [相同的事物] 受 后期拉丁語 essentit3s的影響 [存在] identidem [重復地]
from id [it] * see i-
源自 id [它] *參見 i-