solemn
Cross references: 1. serious sol.emn \'sa:l-*m\ aj [ME solemne, fr. MF, fr. L sollemnis regularly appointed, solemn] 1: marked by the invocation of a religious sanction 2: marked by the observance of established form or ceremony; specif : celebrated with full liturgical ceremony 3a: awe-inspiring : SUBLIME 3b: highly serious : GRAVE, SOBER 3c: SOMBER, GLOOMY - sol.emn.ly av