Entry 1 sense Webster, 1913 Razorbill /(-bĭl`)/ · Ra·zor·bill · IPA /ˈɹeɪzɚˌbɪl/ 01 n. A species of auk (Alca torda) common in the Arctic seas. See Auk, and Illust. in Appendix. 1. A species of auk (Alca torda) common in the Arctic seas. See Auk, and Illust. in Appendix.(Zool.) See: Auk