ritual
noun
[ ˈrɪtʃʊəl ]
• a religious or solemn ceremony consisting of a series of actions performed according to a prescribed order.
• "ancient fertility rituals"
ritual
adjective
• relating to or done as a religious or solemn rite.
• "ritual burial"
Origin:
late 16th century (as an adjective): from Latin ritualis, from ritus (see rite).