Entry 1 sense Webster, 1913 Experimentation /ĭk-spĕrˌ-əm-ən-tāsh'-ən/ · Ex·per·i·men·ta·tion · IPA /ɪkˌspɛɹ.ə.mənˈteɪ.ʃən/ 01 n. The act of experimenting; practice by experiment. 1. The act of experimenting; practice by experiment.