Entry 1 sense Webster, 1913 Lubrication /lo͞obˌ-rĭk-āsh'-ən/ · Lu·bri·ca·tion · IPA /ˌluː.bɹɪˈkeɪ.ʃən/ 01 n. The act of lubricating; the act of making slippery. 1. The act of lubricating; the act of making slippery.