-shəˌnizəm noun
( -s )
1.
a. : a policy directed toward the isolation of a nation from other nations by a deliberate abstention from alliances and other international political and economic relations
American foreign policy was set on a course of isolationism — Dorothy B. Goebel
a peculiarly hopeless kind of new Asian isolationism — H.R.Isaacs
b. : a disposition or tendency to isolate deliberately an individual or group (as a political party) or a field of endeavor (as education or intellectual activity) from outside and especially foreign relations or influences
uncontrolled isolationism would estrange the party from … the leaders of friendly cooperative non-Communist parties — H.A.Steiner
ivory-tower cultural isolationism — Leslie Rees
2. : an attitude or conviction favoring adherence to a policy of deliberate isolation
isolationism can never again dominate America — G.W.Chapman
the hard core of isolationism in the United States has been ethnic and emotional — Samuel Lubell
— compare internationalism , interventionism