|Origin:||sérieux, from Late Latin seriosus, from Latin serius|
se‧ri‧ous S1 W1
a serious situation, problem, accident etc is extremely bad or dangerous:
the serious problem of unemployment
Luckily, the damage was not serious.
serious injury/illness/accident etc
a serious accident on the freeway
Oil spills pose a serious threat to marine life.
Serious crimes have increased dramatically.
if someone is serious about something they say, they really mean it and are not joking or pretending
be serious about
Is she serious about giving up her job?
I'm serious (=used to emphasize that you mean what you say)
deadly/dead serious (=definitely not joking)
She sounded dead serious.
used to tell someone that what they have just said is silly or that you do not believe it:
'It's enough to make anyone commit murder!' 'Be serious, Jo.'
Marry Frank? You can't be serious!
important and needing a lot of thought or attention:
This is a very serious matter.
the serious business of earning a living
Be quiet, Jim. This is serious.
a serious article
serious attention/consideration/thought (=careful and thorough attention etc)
I'll give your suggestion serious consideration.
used to emphasize that you are talking about a large amount of something:
large amount[only before noun] informal
The President was in serious trouble.
In industry, you can earn serious money.
a serious romantic relationship is likely to continue for a long time:
It's serious - they've been seeing each other for six months.
Are you really serious about her?
someone who is serious is very quiet and sensible
very interested in an activity or subject, and spending a lot of time doing it:
sport/activity[only before noun]
He's become a serious golfer since he retired.
Chris is a serious photographer.
very good and often expensive:
very good[only before noun] informal
He's got a serious car!
slightly worried or unhappy:
You look serious. What's wrong?