Entry 1 sense Webster, 1913 Excogitation · Ex·cog·i·ta·tion · IPA /ɛksˌkɑdʒəˈteɪʃən/ 01 n. The act of excogitating; a devising in the thoughts; invention; contrivance. 1. The act of excogitating; a devising in the thoughts; invention; contrivance.