1 bad or dangerous 严重的;危险的:
a serious accident/illness/offence严重的意外╱疾病╱罪行Pollution is a very serious problem.污染是很严重的问题。Her condition is serious and she's likely to be in hospital for some time.她病得很重,可能要在医院里待一些时候。
2 needing to be treated as important, not just for fun 严肃的;认真的:
Don't laugh, it's a serious matter.不要笑,这是严肃的事情。a serious discussion认真的讨论
3serious (about sth/about doing sth) (used about a person) not joking; thinking about things in a careful and sensible way (指人)正经的,严肃的:
Are you serious about starting your own business (= are you really going to do it)?你真的要创立自己的生意吗?He's terribly serious. I don't think I've ever seen him laugh.他严肃极了,我从来没有见过他笑。You're looking very serious. Was it bad news?你看来满怀心事,是不是有什么坏消息? ➔seriousnessnoun [U]