From Longman Dictionary of Contemporary Englishisolationismi‧so‧la‧tion‧is‧m /ˌaɪsəˈleɪʃənɪzəm/ AWL noun [uncountable] PPbeliefs or actions that are based on the political principle that your country should not be involved in the affairs of other countries —isolationist adjective isolationist policies —isolationist noun [countable]
Examples from the Corpus
isolationism• It is very hard to realize to what degree isolationism has been a basic feature of the United States.• This may seem like isolationism, but that is not quite correct.• But those of us who understand history must shudder at his adulation of the false gods of isolationism and protectionism.• The subsequent phase between 1934 and 1939 signalled the return of the party from the political wilderness of sectarian isolationism.• They have a link that all three share in Bristol's sturdy stylistic isolationism.• Far from rejecting internationalism and retreating to isolationism, the Republicans were proposing to go beyond containment.From Longman Business Dictionaryisolationismi‧so‧la‧tion‧is‧m /ˌaɪsəˈleɪʃənɪzəm/ noun [uncountable] the belief that your country should not be involved in the affairs of other countries1853 saw the end of Japanese isolationism. —isolationist adjectiveisolationist policies —isolationist noun [countable] 