identity

Noun

• exact sameness
  • they shared an identity of interests
    

• an operator that leaves unchanged the element on which it operates
  • the identity under numerical multiplication is 1
    

• 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
    

• the distinct personality of an individual regarded as a persisting entity
  • you can lose your identity when you join the army
    

Related words

• Synonyms: 
  identicalness , indistinguishability , identity element , identity operator , personal identity , individuality