BASILAN Meaning of BASILAN in English /beuh see"lahn/ , n.1. an island in the Philippines, SW of Mindanao. 495 sq. mi. (1282 sq. km). 2. Formerly, Isabela . a city on this island. 201,407. Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012