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!"遊びまたはつまらないことよりも仕事または重要な事柄に関心のある真面目
例:a serious student of history 歴史学の真剣な学生
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"大きな危害を脅かすことにより恐れまたは不安を引き起こすさま重大
例:a serious wound 大けが
appealing to the mind; "good music"; "a serious book"心に訴えるさま良質
例:a serious book 真面目な本
of great consequence; "marriage is a serious matter"非常に重大な重大
例:marriage is a serious matter 結婚は重大な問題です
completely lacking in playfulness陽気さが完全に不足するさま鹿爪らしい