<p><strong>Adjective</strong></p><ul><li>grave, sober, or mirthless, as a person, the face, speech, tone, or mood: solemn remarks</li><li>Synonyms: unsmiling, serious</li><li>Antonyms: humorous</li><li>gravely or somberly impressive; causing serious thoughts or a grave mood: solemn music</li><li>Synonyms: stately, imposing, august</li><li>Antonyms: trivial</li><li>serious or earnest: solemn assurances</li><li>characterized by dignified or serious formality, as proceedings; of a formal or ceremonious character: a solemn occasion</li><li>Synonyms: ceremonial, ritual</li><li>made in due legal or other express form, as a declaration or agreement: a solemn oath</li><li>marked or observed with religious rites; having a religious character: a solemn holy day</li><li>Synonyms: sacred, devotional</li><li>uttered, prescribed, or made according to religious forms: a solemn ban on sacrifice</li></ul>