Opposed to or against the principles, practices, or institution of monarchy.
From anti- + monarchial (from monarchy + -ial, a suffix forming adjectives). This variant of antimonarchal emphasizes opposition to monarchical principles.
The distinction between 'antimonarchial' (against the institution) and 'antimonarchic' (against the practice of ruling) helps historians understand whether revolutionaries wanted to replace a king with something else or eliminate the whole concept of hereditary rule.
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