seriously 2022.12.06 seriouslyとは 意味・定義・例文 Adverb 副詞 1. in a serious or literal manner 真面目に, 本当に, 本気で, 厳粛に Take your work more seriously. 2. very much ひどく, 深刻に; かなり, とても, すごく She was seriously injured in the accident.