#1 observance n. [observation, watching] the act of observing; taking a patient look. wn
#2 observance n. [ceremony, ceremonial, ceremonial occasion] a formal event performed on a special occasion; "a ceremony commemorating Pearl Harbor". wn
#3 observance n. [notice, observation] the act of noticing or paying attention; "he escaped the notice of the police". wn
#4 observance n. [honoring] conformity with law or custom or practice etc.. wn
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