1.NounThe act of identifying (i.e., which one, which thing).
"In many network protocols, identification is complemented by authentication."
2.NounThe combination of identifying (which one, which thing) and validating the identity (proving or confirming it); identifying and authenticating viewed as a unitary concept in cognition.
"Much education and experience is required for proper identification of bird species."
3.NounThe state of being identified.
"The problem's identification was the first step toward dealing with it."
4.NounA particular instance of identifying something.
"information necessary to make a good identification"
5.NounA document or documents serving as evidence of a person's identity.
"The authorities asked for his identification."
6.NounA feeling of support, sympathy, understanding, or belonging towards somebody or something.