Entry 1 sense Webster, 1913 Regelation /(-l?"sh?n)/ · Re·ge·la·tion · IPA /ˌriːd͡ʒɪˈleɪʃən/ 01 n. The act or process of freezing anew, or together,as two pieces of ice. 1. The act or process of freezing anew, or together,as two pieces of ice.(Physics)