[noo-truh-liz-uh m, nyoo-]
  1. the policy or advocacy of maintaining strict neutrality in foreign affairs.
  2. Biology. the theory that some changes in evolution are governed by random mutations that become fixed in populations by chance rather than by natural selection.

Origin of neutralism

First recorded in 1570–80; neutral + -ism
Related formsan·ti·neu·tral·ism, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for neutralism


  1. (in international affairs) the policy, practice, or attitude of neutrality, noninvolvement, or nonalignment with power blocs
Derived Formsneutralist, noun, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012