Entry 1 sense Webster, 1913 Anachronistic /ən-ăkˌ-rən-ĭs'-tĭk/ · An·ach·ro·nis·tic · IPA /əˌnæk.ɹəˈnɪs.tɪk/ 01 a. Erroneous in date; containing an anachronism. 1. Erroneous in date; containing an anachronism.