- Margaret (Hilda),1925–2013, British political leader: prime minister 1979–90.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Margaret (Hilda), Baroness (née Roberts). 1925–2013, British stateswoman; leader of the Conservative Party (1975–90); prime minister (1979–90)
Word Origin and History for margaret thatcher
early 14c. (late 12c. as a surname); agent noun from thatch (v.).
Online Etymology Dictionary, © 2010 Douglas Harper