Margaret (Hilda) Baroness Thatcher of Kesteven (born Margaret Hilda Roberts) 1925-; Brit. politician: prime minister (1979-90)
See Thatcher in American Heritage Dictionary 4
British Conservative politician who served as prime minister (1979-1990). Her administration was marked by anti-inflationary measures, a brief war in the Falkland Islands (1982), and the passage of a poll tax.