Pan-Germanism n (Historical Terms) (esp in the 19th century) the movement for the unification of Germany Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Pan-Germanisma 19th-century political movement whose aim was the unification of all Germans.See also: Politics-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.