Synonyms of serious in English:
1 he had a serious expression on his face Prudence was a thin, pale, serious young woman
solemn, earnest, grave, sober, sombre, unsmiling, poker-faced, stern, grim, dour, humourless, stony-faced;
thoughtful, preoccupied, deep in thought, pensive, meditative, ruminative, contemplative, introspective;
staid, sedate, studious, bookish
[Antonyms] light-hearted, cheerful, jovial
3 the president should give serious consideration to this advice
careful, detailed, in-depth, deep, profound, meaningful
5 four of the victims received serious injuries he appealed for emergency foreign aid to combat the serious shortages of foodstuff and medicines
severe, grave, bad, critical, acute, alarming, worrying, grievous, dreadful, terrible, dire, extreme, dangerous, perilous, precarious
archaic or , humorous parlous
[Antonyms] minor, negligible
7 informal she spends serious sums of money See considerable
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