Definition of ceremonious adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌserəˈməʊniəs//
; NAmE NAmE//ˌserəˈmoʊniəs//
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behaving or performed in an extremely formal way She unveiled the picture with a ceremonious gesture. opposite unceremonious Word Originmid 16th cent.: from French cérémonieux or late Latin caerimoniosus, from Latin caerimonia ‘religious worship’, (plural) ‘ritual observances’.
See the Oxford Advanced American Dictionary entry: ceremonious