1. the action or process of identifying someone or something or the fact of being identified: "each child was tagged with a number for identification"Similarrecognitionsingling outpicking outspottingpointing outpinpointingnamingplacingdiscerningdistinguishingdiscoveryfindinglocationinformal:fingering
▪ a means of proving a person's identity, especially in the form of official papers: "I asked to see his identification"SimilarIDpapersidentity papersidentification papersbona fidesdocumentscredentialsID cardidentity cardpassbadgewarrantlicensepermitpassportproof of identityproof of qualificationscertificatediplomareferencestestimonialletter of introductionletter of recommendation