Meaning of identity in English
1. the state of being a specified person or thing; who someone is or what something is
mistaken[false] identity
He revealed[concealed] his identity.
2. the state or fact of being exact or almost exact sameness; exact likeness or close similarity
qualitative identity
I found the same identity between the two companies.
3. the qualities that a person or group of people have that make them what they are and different from other people; individuality, personality, or uniqueness
national[cultural, social, ethnic, ...] identity
lose one's identity