more serious

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somber, humorless adj.
crucial, weighty adj.

ADJECTIVE

somber, humorless

Synonyms

STRONGEST

deliberate genuine honest severe sincere thoughtful

STRONG

sober

WEAK

austere bound bound and determined businesslike cold sober contemplative deadpan determined downbeat earnest funereal go for broke grave grim intent long-faced meditative no-nonsense pensive pokerfaced reflective resolute resolved sedate set solemn staid steady stern unhumorous unsmiling weighty

Antonyms

STRONGEST

deceptive dishonest false insincere misleading untrustworthy

WEAK

flippant funny happy light minor trivial unimportant unserious

ADJECTIVE

crucial, weighty

Synonyms

STRONGEST

dangerous deep difficult far-reaching grievous important major meaningful severe significant tough urgent

WEAK

arduous fateful fell formidable grave grim hard heavy laborious meaning business menacing momentous no joke no laughing matter of consequence operose out for blood playing hard ball pressing smoking sobering strenuous strictly business threatening ugly unamusing unhumorous worrying

Antonyms

STRONGEST

calm easy facile friendly insignificant little meaningless minor small trivial unimportant worthless

WEAK

flippant funny happy light unserious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

more serious

For example, a brief drop in a patient’s blood-oxygen reading could be given time to correct itself, while a more serious or sustained drop would trigger an alarm sooner.

From The Wall Street Journal ● Sep. 28, 2026

The four bills would turn some misdemeanor offenses into felonies, increase the time of license suspensions for some offenders, and make it possible for repeat DUI drivers to face more serious charges, including murder.

From Los Angeles Times ● Sep. 25, 2026

The couple’s decision to spend the festive season together with her family marked an indication that their relationship was growing more serious.

From MarketWatch ● Sep. 23, 2026

More than 40,000 cases – which range from coughs to bronchitis and more serious conditions like pneumonia – involve toddlers.

From BBC ● Sep. 23, 2026

Now that the Christmas holiday is passed, life seems on a more serious course.

From "Between Shades of Gray" by Ruta Sepetys