Pal·me (päl?m?), Olof 1927-1986. Swedish politician. As prime minister (1969-1976 and 1982-1986), he opposed the nuclear arms race. Palme was assassinated in 1986.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Palme (Swedish ?palm?) n (Biography) (Sven) Olof (Joachim) (?u?lof). 1927?86, Swedish Social Democratic statesman; prime minister (1969?76, 1982?86); assassinatedCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014