a. The quality or condition of being the same in substance, composition,

a. nature, properties, or in particular qualities under consideration; b. absolute or essential sameness; oneness.

  absolute identity, that asserted in the metaphysical

c. doctrine of Schelling that mind and matter are phenomenal

d. modifications of the same substance. b. with an and pl. An instance of this quality c. Recurrence of the same; repetition. Obs2. a. The sameness of a person or thing at all times or in all circumstances; the condition or fact that a person or thing is itself and not something else; individuality, personality.

  personal identity (in Psychology), the condition or fact of remaining the same person throughout the various phases of existence; continuity of the personality. b. Personal or individual existence. rare. ?Obs

3. ‘The self-same thing.’ Obs. Rare

4. Alg.    a. The equality of two expressions for all values of the literal quantities: distinctively denoted by the sign b. An equation expressing identity, an identical equation5. The condition of being identified in feeling, interest, etc. rare.6. Logic. Law or Principle of Identity, the principle expressed in the identical proposition A is A. Also attrib., as identity formula, relation, sentence.7. (old) identity: a person long resident or well known in a place. N.Z. and Austral.8. Math.    a. An element of a set which, if combined with any element by a (specified) binary operation, leaves the latter element unchanged. b. A transformation that gives rise to the same elements as those to which it is applied9. S. Afr. (See quot. 1924.)10. a. attrib. and Comb. with the meaning ‘that serves to identify the holder or wearer’, as identity bracelet, card, certificate, disc, papers, patch b. Philos. attrib. and Comb. as identity doctrine, sign, thesis; identity theory, the materialist theory that physiological and mental perceptions are identical; hence identity theorist, a person professing belief in the identity theory. c. Belonging or relating to identity (sense 2), as in identity crisis, a phase of varying severity undergone by an individual in his need to establish his identity in relation to his associates and society as part of the process of maturing. Also transf.

http://dictionary.oed.com/cgi/entry/50111220?query_type=word&queryword=identity&first=1&max_to_show=10&sort_type=alpha&result_place=1&search_id=AeuV-OhDRhH-2817&hilite=501

Identity

Shen fen who you are the clues he left did not establish his identity

Tian xing all the qualities, beliefs, and ideas which you make you feel that you are different from everyone else or that you belong that you belong to a particular group. ...... your sense of identity, of who you are and what you are.

Experience

In the eternal universe, every human being has a one-off chance to liveIt is not easy to be what one really is. There is many a person in the world who can be identified as anything ---either his job, his status or his social role---that shows no trace about his individuality. It does do him justice to say that he has no identity of his own, if he doesn't know his own mind and all his things are either arranged by others or done on others' suggestions; if his life, always occupied by external things, is completely void of an inner world. You won't be able to find anything whatever, from head to heart, that truly belongs to him. He is, indeed, no more than a shadow cast by somebody else or a machine capable of doing business.

Identity 【 webpage】

<http://news.bbc.co.uk/2/hi/programmes/click_online/7375772.stm>

BBC NEWS | Programmes | Click | Identity 'at risk' on Facebook By Spencer Kelly Presenter, BBC Click

Personal details of Facebook users could potentially be stolen, the BBC technology programme Click has found.

This website provides stealing details, mining data, security advice for facebook users, concerns to facebook and the commons from facebook users. The identity ‘at risk’ becomes a social problem and attracts people’s attention.