Entry 1 sense Webster, 1913 Cogitation /kŏj'ĭ-tāʹshən/ · Cog·i·ta·tion · IPA /ˌkɑd͡ʒ.ɪˈteɪ.ʃən/ 01 n. The act of thinking; thought; meditation; contemplation. 1. The act of thinking; thought; meditation; contemplation.