ceremonious
UK: /ˌserɪˈməʊniəs/ | US: /ˌserɪˈmoʊniəs/
adj. excessively formal or polite, especially in a way that is deliberate or showy
adj. relating to or appropriate for a ceremony; ritualistic
The word "ceremonious" derives from the noun "ceremony," which entered English in the 14th century from Old French ceremonie (itself from Latin caerimonia, meaning "religious worship" or "sacred rite"). The suffix "-ous" (from Latin -osus) was added to form an adjective, implying "full of ceremony" or "characterized by formal rituals." Over time, the meaning expanded to describe behavior that is meticulously—sometimes excessively—formal, reflecting the rigid structure of traditional ceremonies.
The host greeted each guest with ceremonious politeness, bowing deeply.
Their wedding was a ceremonious affair, with every detail meticulously planned.
He dismissed the idea with a ceremonious wave of his hand.
The ambassador’s speech was overly ceremonious, alienating some listeners.
She found his ceremonious manners charming at first, but later tiresome.