1. identity the characteristics by which a thing or person is known
  2. identity theft the co-option of another person's personal information (e.g., name, Social Security number, credit card number, passport) without that person's knowledge and the fraudulent use of such knowledge
  3. identity crisis distress and disorientation (especially in adolescence) resulting from conflicting pressures and uncertainty about one's self and one's role in society
  4. identity element an operator that leaves unchanged the element on which it operates
  5. identity card a card certifying the identity of the bearer
  6. identity matrix a scalar matrix in which all of the diagonal elements are unity
  7. identity operator an operator that leaves unchanged the element on which it operates
  8. identity verification the automatic identification of living individuals by using their physiological and behavioral characteristics