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observance

1 ENTRIES FOUND:
observance /əbˈzɚvəns/ noun
plural observances
observance
/əbˈzɚvəns/
noun
plural observances
Britannica Dictionary definition of OBSERVANCE
[noncount] : the practice of following a custom, rule, law, etc. often + of
[count] : an act that is part of a ceremony or ritual usually plural