Entry 1 sense Webster, 1913 Labyrinthian · Lab·y·rin·thi·an · IPA /læb.əˈɹɪn.θi.ɛn/ 01 a. Intricately winding; like a labyrinth; perplexed; labyrinthal. 1. Intricately winding; like a labyrinth; perplexed; labyrinthal.