(ת') רציני; חמור; כבד-ראש; חמור-סבר

adj. solemn, grave; acute, critical; important, requiring much consideration; humorless, grim

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Adjective
1. concerned with work or important matters rather than play or trivialities; "a serious student of history"; "a serious attempt to learn to ski"; "gave me a serious look"; "a serious young man"; "are you serious or joking?"; "Don't be so serious!"
(antonym) frivolous
(similar) capital
(attribute) seriousness, earnestness, serious-mindedness, sincerity
2. of great consequence; "marriage is a serious matter"
(similar) important, of import
3. causing fear or anxiety by threatening great harm; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease"
(synonym) dangerous, grave, grievous, severe, life-threatening
(similar) critical
4. appealing to the mind; "good music"; "a serious book"
(synonym) good
(similar) intellectual
5. completely lacking in playfulness
(synonym) unplayful, sober
(attribute) playfulness, fun
6. requiring effort or concentration; complex and not easy to answer or solve; "raised serious objections to the proposal"; "the plan has a serious flaw"
(similar) difficult, hard

příd.jm. vážný; závažný; těžký; důležitý

Przym. poważny; (na) serio