Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “serious”

serious

adjective uk   /ˈsɪə.ri.əs/ us    /ˈsɪr.i-/

serious adjective (BAD)

B1 severe in effect; bad: a serious illness There were no reports of serious injuries. The new tax regulations have landed some of the smaller companies in serious trouble. Drugs have become a serious problem in a lot of schools. This is a very serious offence. He's been taken to hospital where his condition is described as serious but stable. [after noun] mainly Indian English very ill

serious adjective (NOT JOKING)

B1 not joking or intended to be funny: Please don't laugh - I'm being serious. He was wearing a very serious expression and I knew something was wrong. On the surface it's a very funny novel but it does have a more serious underlying theme. B1 A serious person is quiet, thinks carefully about things, and does not laugh a lot: I remember her as a very serious child.

serious adjective (DETERMINED)

[after verb] determined to follow a particular plan of action: Is she serious about going to live abroad? [after verb] If two people who have a loving relationship are serious about each other, they intend to stay with each other for a long time and possibly marry: She's had a lot of boyfriends but Simon's the only one she's been serious about.

serious adjective (NEEDING ATTENTION)

B2 [before noun] needing or deserving your complete attention: That's an interesting job offer - I'd give it some serious consideration if I were you. We've got some serious talking to do, you and me.

serious adjective (EXTREME)

informal extreme in degree or amount: We did some fairly serious walking over the weekend. I mean we're talking serious (= a large amount of) money, right? informal very good of its type: This is a serious wine, Belle, you've just got to try some.
(Definition of serious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of serious?
Add Cambridge dictionaries to your browser to your website

Definitions of “serious” in other dictionaries

Word of the Day

see the light of day

When something sees the light of day, it appears for the first time.

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More