Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Governmentsultanatesul‧tan‧ate /ˈsʌltəneɪt, -nət/ noun [countable] 1 PGa country ruled by a sultan the sultanate of Oman2 PGthe position of a sultan, or the period of time during which he rules ldoceonline.com