ceremonial

US /ˌser.əˈmoʊ.ni.əl/
UK /ˌser.əˈmoʊ.ni.əl/
1.

nghi lễ

related to, used in, or involving a ceremony (= a fixed set of formal acts performed on important social or religious occasions):

:
A Marine honor guard flanks the president during ceremonial events at the White House.
1.

nghi lễ

(a set of) formal acts, often fixed and traditional, performed on important social or religious occasions:

:
Westminster Abbey is used for ceremonials.