Entry 1 sense Webster, 1913 Identification /īd-ĕnˌ-təf-ək-āsh'-ən/ · I·den·ti·fi·ca·tion · IPA /aɪˌdɛn(t)ɪfɪˈkeɪʃn̩/ 01 n. The act of identifying, or proving to be the same; also, the state of being identified. 1. The act of identifying, or proving to be the same; also, the state of being identified.