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Definitions

serious

[seer-ee-uhs] / ˈsɪər i əs /
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.

Animal activists are calling for a ban on live reindeer events this Christmas, claiming their evidence shows serious welfare concerns.

From BBC

The Korean Medical Association said in a statement on Wednesday that government funds should go to more serious diseases before hair loss.

From BBC

A public inquiry into the bombing, led by Sir John Saunders, later found that chances to stop the attack had been missed along with "serious shortcomings" in security and individual failings.

From BBC

But estimated figures on flu deaths shows that some winters have been particularly serious over the past 20 years.

From BBC

It can lead to serious health problems including infections, bleeding, infertility and complications in childbirth.

From Barron's

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.