To convert something into common ownership or to organize something according to communist principles (American spelling variant).
From commune (Latin communis) + -ize suffix (American spelling). The -ize ending was preferred in American English while British English used -ise.
The spelling split between 'communise' and 'communize' reflects deeper historical differences: American English kept Latin -ize endings to distinguish from French -ise, while British English gradually adopted -ise across the board by the early 20th century.
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