Koorilian \Koo*ril"i*an\, a & n. Same as {Kurilian}. Kurilian \Ku*ril"i*an\, a. Of or pertaining to the Kurile Islands, a chain of islands in the Pacific ocean, extending from the southern extremity of Kamschatka to Yesso. -- n. A native or an inhabitant of the Kurile Islands. [Written also {Koorilian}.]