Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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serious

ser·i·ous

serious

 
pronunciation:
si ri s
features:
Word Explorer
part of speech: adjective
definition 1: marked by careful, weighty thinking.
She gave his application a serious review.He'll have to make a serious decision about this.
synonyms:
painstaking, thoughtful
antonyms:
cursory, merry, superficial
similar words:
businesslike, careful, contemplative, earnest, meditative, meticulous, ruminative, sincere, solid
definition 2: not lighthearted; sober; grave.
He was a man with a serious nature, who seldom laughed and never joked.Because it was a serious occasion, the children were not allowed to play and were made to sit quietly.
synonyms:
earnest, grave, sober
antonyms:
airy, amusing, cheerful, comic, comical, facetious, frivolous, funny, giddy, humorous, idle, light, lighthearted, merry, playful, unserious
similar words:
grim, humorless, severe, solemn, somber, staid, unsmiling
definition 3: not trivial; important; weighty.
Pollution is a serious matter.Armed robbery is a serious offense.
synonyms:
crucial, grave, heavy, important, weighty
antonyms:
comic, frivolous, idle, light, minor, negligible, ridiculous, superficial, trifling, trivial, unimportant
similar words:
consequential, deep, earnest, far-reaching, fateful, great, momentous, significant, vital
definition 4: causing apprehension or requiring immediate attention.
He has a serious heart condition.The company is facing a serious financial crisis.
synonyms:
acute, alarming, critical, exigent, grave
antonyms:
minor
similar words:
bad, crucial, dangerous, deep, fearful, harmful, hazardous, heavy, menacing, perilous, severe
derivations: seriously (adv.), seriousness (n.)
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