ceremonious

Etymology

From Middle French cérémonieux, from Late Latin caerimoniosus, from Latin caerimonia.

adj

1. Fond of ceremony, ritual or strict etiquette; punctilious
   Ancient and oriental cultures are in many ways more conventional, more ceremonious, and more courteous than our own. 1958, C. S. Lewis, chapter III, in Reflections on the Psalms, Harcourt Brace & Co., published 1986, page 23
2. Characterized by ceremony or rigid formality