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Cas·tle·reagh(kăs′əl-rā′), Viscount. Title of Robert Stewart, Second Marquis of Londonderry. 1769-1822.
British politician who as chief secretary for Ireland (1798-1801) was able to quell the 1798 rebellion and form a political union between Ireland and Great Britain (1800).
(Placename) a district of E Northern Ireland, in Co Down. Pop: 66 076 (2003 est). Area: 85 sq km (33 sq miles)
(Biography) Viscount. title of Robert Stewart, Marquis of Londonderry. 1769–1822, British statesman: as foreign secretary (1812–22) led the Grand Alliance against Napoleon and attended the Congress of Vienna (1815)
Cas•tle•reagh(ˈkæs əlˌreɪ, ˈkɑ səl-)
Robert Stewart, Viscount (2nd Marquess of Londonderry), 1769–1822, British statesman.