ritual
US /ˈrɪtʃ.u.əl/
UK /ˈrɪtʃ.u.əl/

1.
a religious or solemn ceremony consisting of a series of actions performed according to a prescribed order
:
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The ancient tribe performed a sacred ritual to honor their ancestors.
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The wedding ritual included exchanging vows and rings.
1.
of or relating to a ritual
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The dancers performed a highly stylized ritual dance.
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The community observes several ritual practices throughout the year.