Adjective solemn has 2 senses
- grave, sedate, sober, solemn - dignified and somber in manner or character and committed to keeping promises; "a grave God-fearing man"; "a quiet sedate nature"; "as sober as a judge"; "a solemn promise"; "the judge was solemn as he pronounced sentence"
Antonym: frivolous (indirect, via serious)
- earnest, in earnest, sincere, solemn - characterized by a firm and humorless belief in the validity of your opinions; "both sides were deeply in earnest, even passionate"; "an entirely sincere and cruel tyrant"; "a film with a solemn social message"
Antonym: frivolous (indirect, via serious)
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