SLIGO Meaning of SLIGO in English /sluy"goh/ , n.1. a county in Connaught province, in the NW Republic of Ireland. 55,425; 694 sq. mi. (1795 sq. km). 2. its county seat: a seaport. 18,609. Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012